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cocos2d-x/cocos/math/Vec3.inl

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+/**
+ Copyright 2013 BlackBerry Inc.
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+
+ Original file from GamePlay3D: http://gameplay3d.org
+
+ This file was modified to fit the cocos2d-x project
+ */
+
+#include "math/Vec3.h"
+#include "math/Mat4.h"
+
+NS_CC_MATH_BEGIN
+
+
+inline bool Vec3::isZero() const
+{
+    return x == 0.0f && y == 0.0f && z == 0.0f;
+}
+
+inline bool Vec3::isOne() const
+{
+    return x == 1.0f && y == 1.0f && z == 1.0f;
+}
+
+inline void Vec3::add(const Vec3& v)
+{
+    x += v.x;
+    y += v.y;
+    z += v.z;
+}
+
+inline void Vec3::add(float xx, float yy, float zz)
+{
+    x += xx;
+    y += yy;
+    z += zz;
+}
+
+inline float Vec3::length() const
+{
+    return std::sqrt(x * x + y * y + z * z);
+}
+
+inline float Vec3::lengthSquared() const
+{
+    return (x * x + y * y + z * z);
+}
+
+inline void Vec3::negate()
+{
+    x = -x;
+    y = -y;
+    z = -z;
+}
+
+inline void Vec3::scale(float scalar)
+{
+    x *= scalar;
+    y *= scalar;
+    z *= scalar;
+}
+
+inline Vec3 Vec3::lerp(const Vec3 &target, float alpha) const
+{
+    return *this * (1.f - alpha) + target * alpha;
+}
+
+inline void Vec3::set(float xx, float yy, float zz)
+{
+    this->x = xx;
+    this->y = yy;
+    this->z = zz;
+}
+
+inline void Vec3::set(const float* array)
+{
+    GP_ASSERT(array);
+
+    x = array[0];
+    y = array[1];
+    z = array[2];
+}
+
+inline void Vec3::set(const Vec3& v)
+{
+    this->x = v.x;
+    this->y = v.y;
+    this->z = v.z;
+}
+
+inline void Vec3::set(const Vec3& p1, const Vec3& p2)
+{
+    x = p2.x - p1.x;
+    y = p2.y - p1.y;
+    z = p2.z - p1.z;
+}
+
+inline void Vec3::setZero()
+{
+    x = y = z = 0.0f;
+}
+
+inline void Vec3::subtract(const Vec3& v)
+{
+    x -= v.x;
+    y -= v.y;
+    z -= v.z;
+}
+
+inline const Vec3 Vec3::operator+(const Vec3& v) const
+{
+    Vec3 result(*this);
+    result.add(v);
+    return result;
+}
+
+inline Vec3& Vec3::operator+=(const Vec3& v)
+{
+    add(v);
+    return *this;
+}
+
+inline const Vec3 Vec3::operator-(const Vec3& v) const
+{
+    Vec3 result(*this);
+    result.subtract(v);
+    return result;
+}
+
+inline Vec3& Vec3::operator-=(const Vec3& v)
+{
+    subtract(v);
+    return *this;
+}
+
+inline const Vec3 Vec3::operator-() const
+{
+    Vec3 result(*this);
+    result.negate();
+    return result;
+}
+
+inline const Vec3 Vec3::operator*(float s) const
+{
+    Vec3 result(*this);
+    result.scale(s);
+    return result;
+}
+
+inline Vec3& Vec3::operator*=(float s)
+{
+    scale(s);
+    return *this;
+}
+
+inline const Vec3 Vec3::operator/(const float s) const
+{
+    return Vec3(this->x / s, this->y / s, this->z / s);
+}
+
+inline bool Vec3::operator==(const Vec3& v) const
+{
+    return x==v.x && y==v.y && z==v.z;
+}
+
+inline bool Vec3::operator!=(const Vec3& v) const
+{
+    return x!=v.x || y!=v.y || z!=v.z;
+}
+
+inline const Vec3 operator*(float x, const Vec3& v)
+{
+    Vec3 result(v);
+    result.scale(x);
+    return result;
+}
+
+NS_CC_MATH_END