mirror of
https://github.com/genxium/DelayNoMore
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Removed redundant collision related codes.
This commit is contained in:
genxium
parent
b9827f8430
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File diff suppressed because one or more lines are too long
@ -1,164 +0,0 @@
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// This file contains code from the gonum repository:
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// https://github.com/gonum/gonum/blob/master/internal/asm/f64/scalunitaryto_amd64.s
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// it is distributed under the 3-Clause BSD license:
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//
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// Copyright ©2013 The Gonum Authors. All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
|
||||
// * Redistributions of source code must retain the above copyright
|
||||
// notice, this list of conditions and the following disclaimer.
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||||
// * Redistributions in binary form must reproduce the above copyright
|
||||
// notice, this list of conditions and the following disclaimer in the
|
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// documentation and/or other materials provided with the distribution.
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||||
// * Neither the name of the Gonum project nor the names of its authors and
|
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// contributors may be used to endorse or promote products derived from this
|
||||
// software without specific prior written permission.
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||||
//
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||||
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
|
||||
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
||||
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
||||
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
|
||||
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
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// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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// Some of the loop unrolling code is copied from:
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// http://golang.org/src/math/big/arith_amd64.s
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// which is distributed under these terms:
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//
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// Copyright (c) 2012 The Go Authors. All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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||||
// copyright notice, this list of conditions and the following disclaimer
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||||
// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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||||
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// +build !noasm
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#include "textflag.h"
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#define X_PTR SI
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#define Y_PTR DX
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#define DST_PTR DI
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#define IDX AX
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#define LEN CX
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#define TAIL BX
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#define ALPHA X0
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#define ALPHA_2 X1
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// func axpyUnitaryTo(dst []float64, alpha float64, x, y []float64)
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TEXT ·axpyUnitaryTo(SB), NOSPLIT, $0
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MOVQ dst_base+0(FP), DST_PTR // DST_PTR := &dst
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MOVQ x_base+32(FP), X_PTR // X_PTR := &x
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MOVQ y_base+56(FP), Y_PTR // Y_PTR := &y
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MOVQ x_len+40(FP), LEN // LEN = min( len(x), len(y), len(dst) )
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CMPQ y_len+64(FP), LEN
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CMOVQLE y_len+64(FP), LEN
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CMPQ dst_len+8(FP), LEN
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CMOVQLE dst_len+8(FP), LEN
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CMPQ LEN, $0
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JE end // if LEN == 0 { return }
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XORQ IDX, IDX // IDX = 0
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MOVSD alpha+24(FP), ALPHA
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SHUFPD $0, ALPHA, ALPHA // ALPHA := { alpha, alpha }
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MOVQ Y_PTR, TAIL // Check memory alignment
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ANDQ $15, TAIL // TAIL = &y % 16
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JZ no_trim // if TAIL == 0 { goto no_trim }
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// Align on 16-byte boundary
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MOVSD (X_PTR), X2 // X2 := x[0]
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MULSD ALPHA, X2 // X2 *= a
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ADDSD (Y_PTR), X2 // X2 += y[0]
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MOVSD X2, (DST_PTR) // y[0] = X2
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INCQ IDX // i++
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DECQ LEN // LEN--
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JZ end // if LEN == 0 { return }
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no_trim:
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MOVQ LEN, TAIL
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ANDQ $7, TAIL // TAIL := n % 8
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SHRQ $3, LEN // LEN = floor( n / 8 )
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JZ tail_start // if LEN == 0 { goto tail_start }
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MOVUPS ALPHA, ALPHA_2 // ALPHA_2 := ALPHA for pipelining
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loop: // do {
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// y[i] += alpha * x[i] unrolled 8x.
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MOVUPS (X_PTR)(IDX*8), X2 // X_i = x[i]
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MOVUPS 16(X_PTR)(IDX*8), X3
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MOVUPS 32(X_PTR)(IDX*8), X4
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MOVUPS 48(X_PTR)(IDX*8), X5
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MULPD ALPHA, X2 // X_i *= alpha
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MULPD ALPHA_2, X3
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MULPD ALPHA, X4
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MULPD ALPHA_2, X5
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ADDPD (Y_PTR)(IDX*8), X2 // X_i += y[i]
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ADDPD 16(Y_PTR)(IDX*8), X3
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ADDPD 32(Y_PTR)(IDX*8), X4
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ADDPD 48(Y_PTR)(IDX*8), X5
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MOVUPS X2, (DST_PTR)(IDX*8) // y[i] = X_i
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MOVUPS X3, 16(DST_PTR)(IDX*8)
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MOVUPS X4, 32(DST_PTR)(IDX*8)
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MOVUPS X5, 48(DST_PTR)(IDX*8)
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ADDQ $8, IDX // i += 8
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DECQ LEN
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JNZ loop // } while --LEN > 0
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CMPQ TAIL, $0 // if TAIL == 0 { return }
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JE end
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tail_start: // Reset loop registers
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MOVQ TAIL, LEN // Loop counter: LEN = TAIL
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SHRQ $1, LEN // LEN = floor( TAIL / 2 )
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JZ tail_one // if LEN == 0 { goto tail }
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tail_two: // do {
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MOVUPS (X_PTR)(IDX*8), X2 // X2 = x[i]
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MULPD ALPHA, X2 // X2 *= alpha
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ADDPD (Y_PTR)(IDX*8), X2 // X2 += y[i]
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MOVUPS X2, (DST_PTR)(IDX*8) // y[i] = X2
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ADDQ $2, IDX // i += 2
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DECQ LEN
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JNZ tail_two // } while --LEN > 0
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ANDQ $1, TAIL
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JZ end // if TAIL == 0 { goto end }
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tail_one:
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MOVSD (X_PTR)(IDX*8), X2 // X2 = x[i]
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MULSD ALPHA, X2 // X2 *= a
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ADDSD (Y_PTR)(IDX*8), X2 // X2 += y[i]
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MOVSD X2, (DST_PTR)(IDX*8) // y[i] = X2
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end:
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RET
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@ -1,137 +0,0 @@
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// This file contains code from the gonum repository:
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// https://github.com/gonum/gonum/blob/master/internal/asm/f64/axpyunitaryto_amd64.s
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// it is distributed under the 3-Clause BSD license:
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//
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// Copyright ©2013 The Gonum Authors. All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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// * Redistributions of source code must retain the above copyright
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||||
// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright
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||||
// notice, this list of conditions and the following disclaimer in the
|
||||
// documentation and/or other materials provided with the distribution.
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// * Neither the name of the Gonum project nor the names of its authors and
|
||||
// contributors may be used to endorse or promote products derived from this
|
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// software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
|
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// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
||||
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
||||
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
|
||||
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
||||
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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// Some of the loop unrolling code is copied from:
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// http://golang.org/src/math/big/arith_amd64.s
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// which is distributed under these terms:
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//
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// Copyright (c) 2012 The Go Authors. All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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||||
// * Redistributions of source code must retain the above copyright
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||||
// notice, this list of conditions and the following disclaimer.
|
||||
// * Redistributions in binary form must reproduce the above
|
||||
// copyright notice, this list of conditions and the following disclaimer
|
||||
// in the documentation and/or other materials provided with the
|
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
||||
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// +build !noasm
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#include "textflag.h"
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#define MOVDDUP_ALPHA LONG $0x44120FF2; WORD $0x2024 // @ MOVDDUP 32(SP), X0 /*XMM0, 32[RSP]*/
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#define X_PTR SI
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#define DST_PTR DI
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#define IDX AX
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#define LEN CX
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#define TAIL BX
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#define ALPHA X0
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#define ALPHA_2 X1
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// func scalUnitaryTo(dst []float64, alpha float64, x []float64)
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// This function assumes len(dst) >= len(x).
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TEXT ·scalUnitaryTo(SB), NOSPLIT, $0
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MOVQ x_base+32(FP), X_PTR // X_PTR = &x
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MOVQ dst_base+0(FP), DST_PTR // DST_PTR = &dst
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MOVDDUP_ALPHA // ALPHA = { alpha, alpha }
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MOVQ x_len+40(FP), LEN // LEN = len(x)
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CMPQ LEN, $0
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JE end // if LEN == 0 { return }
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XORQ IDX, IDX // IDX = 0
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MOVQ LEN, TAIL
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ANDQ $7, TAIL // TAIL = LEN % 8
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SHRQ $3, LEN // LEN = floor( LEN / 8 )
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JZ tail_start // if LEN == 0 { goto tail_start }
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MOVUPS ALPHA, ALPHA_2 // ALPHA_2 = ALPHA for pipelining
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loop: // do { // dst[i] = alpha * x[i] unrolled 8x.
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MOVUPS (X_PTR)(IDX*8), X2 // X_i = x[i]
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MOVUPS 16(X_PTR)(IDX*8), X3
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MOVUPS 32(X_PTR)(IDX*8), X4
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MOVUPS 48(X_PTR)(IDX*8), X5
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MULPD ALPHA, X2 // X_i *= ALPHA
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MULPD ALPHA_2, X3
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MULPD ALPHA, X4
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MULPD ALPHA_2, X5
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MOVUPS X2, (DST_PTR)(IDX*8) // dst[i] = X_i
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MOVUPS X3, 16(DST_PTR)(IDX*8)
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MOVUPS X4, 32(DST_PTR)(IDX*8)
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MOVUPS X5, 48(DST_PTR)(IDX*8)
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ADDQ $8, IDX // i += 8
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DECQ LEN
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JNZ loop // while --LEN > 0
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CMPQ TAIL, $0
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JE end // if TAIL == 0 { return }
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tail_start: // Reset loop counters
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MOVQ TAIL, LEN // Loop counter: LEN = TAIL
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SHRQ $1, LEN // LEN = floor( TAIL / 2 )
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JZ tail_one // if LEN == 0 { goto tail_one }
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tail_two: // do {
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MOVUPS (X_PTR)(IDX*8), X2 // X_i = x[i]
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MULPD ALPHA, X2 // X_i *= ALPHA
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MOVUPS X2, (DST_PTR)(IDX*8) // dst[i] = X_i
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ADDQ $2, IDX // i += 2
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DECQ LEN
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JNZ tail_two // while --LEN > 0
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ANDQ $1, TAIL
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JZ end // if TAIL == 0 { return }
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tail_one:
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MOVSD (X_PTR)(IDX*8), X2 // X_i = x[i]
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MULSD ALPHA, X2 // X_i *= ALPHA
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MOVSD X2, (DST_PTR)(IDX*8) // dst[i] = X_i
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end:
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RET
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@ -1,9 +0,0 @@
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//go:build !noasm
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// +build !noasm
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package resolv
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// functions from the gonum package that optimizes arithmetic
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// operations on lists of float64 values
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func axpyUnitaryTo(dst []float64, alpha float64, x, y []float64)
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func scalUnitaryTo(dst []float64, alpha float64, x []float64)
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@ -33,20 +33,12 @@ func NewLine(x, y, x2, y2 float64) *Line {
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}
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}
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func (line *Line) Project(axis Vector) Vector {
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return line.Vector().Scale(axis.Dot(line.Start.Sub(line.End)))
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}
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func (line *Line) Normal() Vector {
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dy := line.End[1] - line.Start[1]
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dx := line.End[0] - line.Start[0]
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return Vector{dy, -dx}.Unit()
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}
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func (line *Line) Vector() Vector {
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return line.End.Clone().Sub(line.Start).Unit()
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}
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// IntersectionPointsLine returns the intersection point of a Line with another Line as a Vector. If no intersection is found, it will return nil.
|
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func (line *Line) IntersectionPointsLine(other *Line) Vector {
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@ -79,51 +71,6 @@ func (line *Line) IntersectionPointsLine(other *Line) Vector {
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}
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// IntersectionPointsCircle returns a slice of Vectors, each indicating the intersection point. If no intersection is found, it will return an empty slice.
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func (line *Line) IntersectionPointsCircle(circle *Circle) []Vector {
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points := []Vector{}
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cp := Vector{circle.X, circle.Y}
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lStart := line.Start.Sub(cp)
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lEnd := line.End.Sub(cp)
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diff := lEnd.Sub(lStart)
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a := diff[0]*diff[0] + diff[1]*diff[1]
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b := 2 * ((diff[0] * lStart[0]) + (diff[1] * lStart[1]))
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c := (lStart[0] * lStart[0]) + (lStart[1] * lStart[1]) - (circle.Radius * circle.Radius)
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det := b*b - (4 * a * c)
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if det < 0 {
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// Do nothing, no intersections
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} else if det == 0 {
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t := -b / (2 * a)
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if t >= 0 && t <= 1 {
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points = append(points, Vector{line.Start[0] + t*diff[0], line.Start[1] + t*diff[1]})
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}
|
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} else {
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t := (-b + math.Sqrt(det)) / (2 * a)
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// We have to ensure t is between 0 and 1; otherwise, the collision points are on the circle as though the lines were infinite in length.
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if t >= 0 && t <= 1 {
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points = append(points, Vector{line.Start[0] + t*diff[0], line.Start[1] + t*diff[1]})
|
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}
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t = (-b - math.Sqrt(det)) / (2 * a)
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if t >= 0 && t <= 1 {
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points = append(points, Vector{line.Start[0] + t*diff[0], line.Start[1] + t*diff[1]})
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}
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}
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return points
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}
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type ConvexPolygon struct {
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Points *RingBuffer
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X, Y float64
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@ -294,24 +241,6 @@ func (cp *ConvexPolygon) MoveVec(vec Vector) {
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cp.Y += vec.Y()
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}
|
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// Center returns the transformed Center of the ConvexPolygon.
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func (cp *ConvexPolygon) Center() Vector {
|
||||
|
||||
pos := Vector{0, 0}
|
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|
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vertices := cp.Transformed()
|
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for _, v := range vertices {
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pos.Add(v)
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}
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denom := float64(len(vertices))
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pos[0] /= denom
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pos[1] /= denom
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return pos
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}
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// Project projects (i.e. flattens) the ConvexPolygon onto the provided axis.
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func (cp *ConvexPolygon) Project(axis Vector) Projection {
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axis = axis.Unit()
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@ -453,13 +382,7 @@ func (cp *ConvexPolygon) Intersection(dx, dy float64, other Shape) *ContactSet {
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cp.X += dx
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cp.Y += dy
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if circle, isCircle := other.(*Circle); isCircle {
|
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|
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for _, line := range cp.Lines() {
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||||
contactSet.Points = append(contactSet.Points, line.IntersectionPointsCircle(circle)...)
|
||||
}
|
||||
|
||||
} else if poly, isPoly := other.(*ConvexPolygon); isPoly {
|
||||
if poly, isPoly := other.(*ConvexPolygon); isPoly {
|
||||
|
||||
for _, line := range cp.Lines() {
|
||||
|
||||
@ -476,29 +399,11 @@ func (cp *ConvexPolygon) Intersection(dx, dy float64, other Shape) *ContactSet {
|
||||
}
|
||||
|
||||
if len(contactSet.Points) > 0 {
|
||||
|
||||
for _, point := range contactSet.Points {
|
||||
contactSet.Center = contactSet.Center.Add(point)
|
||||
}
|
||||
|
||||
contactSet.Center[0] /= float64(len(contactSet.Points))
|
||||
contactSet.Center[1] /= float64(len(contactSet.Points))
|
||||
|
||||
if mtv := cp.calculateMTV(contactSet, other); mtv != nil {
|
||||
contactSet.MTV = mtv
|
||||
}
|
||||
|
||||
// Do nothing
|
||||
} else {
|
||||
contactSet = nil
|
||||
}
|
||||
|
||||
// If dx or dy aren't 0, then the MTV will be greater to compensate; this adjusts the vector back.
|
||||
if contactSet != nil && (dx != 0 || dy != 0) {
|
||||
deltaMagnitude := Vector{dx, dy}.Magnitude()
|
||||
ogMagnitude := contactSet.MTV.Magnitude()
|
||||
contactSet.MTV = contactSet.MTV.Unit().Scale(ogMagnitude - deltaMagnitude)
|
||||
}
|
||||
|
||||
cp.X = ogX
|
||||
cp.Y = ogY
|
||||
|
||||
@ -506,76 +411,6 @@ func (cp *ConvexPolygon) Intersection(dx, dy float64, other Shape) *ContactSet {
|
||||
|
||||
}
|
||||
|
||||
// calculateMTV returns the MTV, if possible, and a bool indicating whether it was possible or not.
|
||||
func (cp *ConvexPolygon) calculateMTV(contactSet *ContactSet, otherShape Shape) Vector {
|
||||
|
||||
delta := Vector{0, 0}
|
||||
|
||||
smallest := Vector{math.MaxFloat64, 0}
|
||||
|
||||
switch other := otherShape.(type) {
|
||||
|
||||
case *ConvexPolygon:
|
||||
|
||||
for _, axis := range cp.SATAxes() {
|
||||
if !cp.Project(axis).Overlapping(other.Project(axis)) {
|
||||
return nil
|
||||
}
|
||||
|
||||
overlap := cp.Project(axis).Overlap(other.Project(axis))
|
||||
|
||||
if smallest.Magnitude() > overlap {
|
||||
smallest = axis.Scale(overlap)
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
for _, axis := range other.SATAxes() {
|
||||
|
||||
if !cp.Project(axis).Overlapping(other.Project(axis)) {
|
||||
return nil
|
||||
}
|
||||
|
||||
overlap := cp.Project(axis).Overlap(other.Project(axis))
|
||||
|
||||
if smallest.Magnitude() > overlap {
|
||||
smallest = axis.Scale(overlap)
|
||||
}
|
||||
|
||||
}
|
||||
// Removed support of "Circle" to remove dependency of "sort" module
|
||||
}
|
||||
|
||||
delta[0] = smallest[0]
|
||||
delta[1] = smallest[1]
|
||||
|
||||
return delta
|
||||
}
|
||||
|
||||
// ContainedBy returns if the ConvexPolygon is wholly contained by the other shape provided.
|
||||
func (cp *ConvexPolygon) ContainedBy(otherShape Shape) bool {
|
||||
|
||||
switch other := otherShape.(type) {
|
||||
|
||||
case *ConvexPolygon:
|
||||
|
||||
for _, axis := range cp.SATAxes() {
|
||||
if !cp.Project(axis).IsInside(other.Project(axis)) {
|
||||
return false
|
||||
}
|
||||
}
|
||||
|
||||
for _, axis := range other.SATAxes() {
|
||||
if !cp.Project(axis).IsInside(other.Project(axis)) {
|
||||
return false
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
return true
|
||||
}
|
||||
|
||||
// NewRectangle returns a rectangular ConvexPolygon with the vertices in clockwise order. In actuality, an AABBRectangle should be its own
|
||||
// "thing" with its own optimized Intersection code check.
|
||||
func NewRectangle(x, y, w, h float64) *ConvexPolygon {
|
||||
@ -587,143 +422,6 @@ func NewRectangle(x, y, w, h float64) *ConvexPolygon {
|
||||
)
|
||||
}
|
||||
|
||||
type Circle struct {
|
||||
X, Y, Radius float64
|
||||
}
|
||||
|
||||
// NewCircle returns a new Circle, with its center at the X and Y position given, and with the defined radius.
|
||||
func NewCircle(x, y, radius float64) *Circle {
|
||||
circle := &Circle{
|
||||
X: x,
|
||||
Y: y,
|
||||
Radius: radius,
|
||||
}
|
||||
return circle
|
||||
}
|
||||
|
||||
func (circle *Circle) Clone() Shape {
|
||||
return NewCircle(circle.X, circle.Y, circle.Radius)
|
||||
}
|
||||
|
||||
// Bounds returns the top-left and bottom-right corners of the Circle.
|
||||
func (circle *Circle) Bounds() (Vector, Vector) {
|
||||
return Vector{circle.X - circle.Radius, circle.Y - circle.Radius}, Vector{circle.X + circle.Radius, circle.Y + circle.Radius}
|
||||
}
|
||||
|
||||
// Intersection tests to see if a Circle intersects with the other given Shape. dx and dy are delta movement variables indicating
|
||||
// movement to be applied before the intersection check (thereby allowing you to see if a Shape would collide with another if it
|
||||
// were in a different relative location). If an Intersection is found, a ContactSet will be returned, giving information regarding
|
||||
// the intersection.
|
||||
func (circle *Circle) Intersection(dx, dy float64, other Shape) *ContactSet {
|
||||
|
||||
var contactSet *ContactSet
|
||||
|
||||
ox := circle.X
|
||||
oy := circle.Y
|
||||
|
||||
circle.X += dx
|
||||
circle.Y += dy
|
||||
|
||||
// here
|
||||
|
||||
switch shape := other.(type) {
|
||||
case *ConvexPolygon:
|
||||
// Maybe this would work?
|
||||
contactSet = shape.Intersection(-dx, -dy, circle)
|
||||
if contactSet != nil {
|
||||
contactSet.MTV = contactSet.MTV.Scale(-1)
|
||||
}
|
||||
case *Circle:
|
||||
|
||||
contactSet = NewContactSet()
|
||||
|
||||
contactSet.Points = circle.IntersectionPointsCircle(shape)
|
||||
|
||||
if len(contactSet.Points) == 0 {
|
||||
return nil
|
||||
}
|
||||
|
||||
contactSet.MTV = Vector{circle.X - shape.X, circle.Y - shape.Y}
|
||||
dist := contactSet.MTV.Magnitude()
|
||||
contactSet.MTV = contactSet.MTV.Unit().Scale(circle.Radius + shape.Radius - dist)
|
||||
|
||||
for _, point := range contactSet.Points {
|
||||
contactSet.Center = contactSet.Center.Add(point)
|
||||
}
|
||||
|
||||
contactSet.Center[0] /= float64(len(contactSet.Points))
|
||||
contactSet.Center[1] /= float64(len(contactSet.Points))
|
||||
|
||||
// if contactSet != nil {
|
||||
// contactSet.MTV[0] -= dx
|
||||
// contactSet.MTV[1] -= dy
|
||||
// }
|
||||
|
||||
// contactSet.MTV = Vector{circle.X - shape.X, circle.Y - shape.Y}
|
||||
}
|
||||
|
||||
circle.X = ox
|
||||
circle.Y = oy
|
||||
|
||||
return contactSet
|
||||
}
|
||||
|
||||
// Move translates the Circle by the designated X and Y values.
|
||||
func (circle *Circle) Move(x, y float64) {
|
||||
circle.X += x
|
||||
circle.Y += y
|
||||
}
|
||||
|
||||
// MoveVec translates the Circle by the designated Vector.
|
||||
func (circle *Circle) MoveVec(vec Vector) {
|
||||
circle.X += vec.X()
|
||||
circle.Y += vec.Y()
|
||||
}
|
||||
|
||||
// SetPosition sets the center position of the Circle using the X and Y values given.
|
||||
func (circle *Circle) SetPosition(x, y float64) {
|
||||
circle.X = x
|
||||
circle.Y = y
|
||||
}
|
||||
|
||||
// SetPosition sets the center position of the Circle using the Vector given.
|
||||
func (circle *Circle) SetPositionVec(vec Vector) {
|
||||
circle.X = vec.X()
|
||||
circle.Y = vec.Y()
|
||||
}
|
||||
|
||||
// Position() returns the X and Y position of the Circle.
|
||||
func (circle *Circle) Position() (float64, float64) {
|
||||
return circle.X, circle.Y
|
||||
}
|
||||
|
||||
// PointInside returns if the given Vector is inside of the circle.
|
||||
func (circle *Circle) PointInside(point Vector) bool {
|
||||
return point.Sub(Vector{circle.X, circle.Y}).Magnitude() <= circle.Radius
|
||||
}
|
||||
|
||||
// IntersectionPointsCircle returns the intersection points of the two circles provided.
|
||||
func (circle *Circle) IntersectionPointsCircle(other *Circle) []Vector {
|
||||
|
||||
d := math.Sqrt(math.Pow(other.X-circle.X, 2) + math.Pow(other.Y-circle.Y, 2))
|
||||
|
||||
if d > circle.Radius+other.Radius || d < math.Abs(circle.Radius-other.Radius) || d == 0 && circle.Radius == other.Radius {
|
||||
return nil
|
||||
}
|
||||
|
||||
a := (math.Pow(circle.Radius, 2) - math.Pow(other.Radius, 2) + math.Pow(d, 2)) / (2 * d)
|
||||
h := math.Sqrt(math.Pow(circle.Radius, 2) - math.Pow(a, 2))
|
||||
|
||||
x2 := circle.X + a*(other.X-circle.X)/d
|
||||
y2 := circle.Y + a*(other.Y-circle.Y)/d
|
||||
|
||||
return []Vector{
|
||||
{x2 + h*(other.Y-circle.Y)/d, y2 - h*(other.X-circle.X)/d},
|
||||
{x2 - h*(other.Y-circle.Y)/d, y2 + h*(other.X-circle.X)/d},
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
type Projection struct {
|
||||
Min, Max float64
|
||||
}
|
||||
|
||||
@ -31,6 +31,7 @@ func (v Vector) Clone() Vector {
|
||||
return clone
|
||||
}
|
||||
|
||||
/*
|
||||
// Add a vector with a vector or a set of vectors
|
||||
func Add(v1 Vector, vs ...Vector) Vector {
|
||||
return v1.Clone().Add(vs...)
|
||||
@ -81,6 +82,7 @@ func (v Vector) Scale(size float64) Vector {
|
||||
scalUnitaryTo(v, size, v)
|
||||
return v
|
||||
}
|
||||
*/
|
||||
|
||||
// Equal compares that two vectors are equal to each other
|
||||
func Equal(v1, v2 Vector) bool {
|
||||
|
||||
Loading…
Reference in New Issue
Block a user