加入v2版本圆角裁剪
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caizhitao
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167
assets/effects/sprite-round-corner-crop-v2.effect
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assets/effects/sprite-round-corner-crop-v2.effect
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// Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.
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// 圆角裁剪（支持任意宽高纹理）
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// 原理：
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// 1. 正方形纹理的圆角原理参考 https://www.cnblogs.com/jqm304775992/p/4987793.html
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// 2. 正方形纹理的圆角代码参考 yanjifa/shaderDemor 的 https://github.com/yanjifa/shaderDemo/blob/master/assets/Effect/CircleAvatar.effect
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// 3. 上述皆为只针对正方形纹理做的操作，如果是长方形的纹理，那么圆角就会有拉伸后的效果，最后变成看起来就不是圆角了，本特效支持任意长方形做圆角
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CCEffect %{
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techniques:
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- passes:
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- vert: vs
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frag: fs
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blendState:
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targets:
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- blend: true
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rasterizerState:
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cullMode: none
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properties:
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texture: { value: white }
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alphaThreshold: { value: 0.5 }
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# 圆角x轴半径长度（相对于纹理宽度）
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xRadius: {
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value: 0.1026,
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inspector: {
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tooltip: "圆角x轴半径长度（相对于纹理宽度）",
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range: [0.0, 0.5]
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}
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}
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# 圆角y轴半径长度（相对于纹理高度）
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yRadius: {
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value: 0.0741,
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inspector: {
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tooltip: "圆角x轴半径长度（相对于纹理高度）",
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range: [0.0, 0.5]
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}
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}
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}%
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CCProgram vs %{
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precision highp float;
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#include <cc-global>
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#include <cc-local>
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in vec3 a_position;
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in vec4 a_color;
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out vec4 v_color;
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#if USE_TEXTURE
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in vec2 a_uv0;
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out vec2 v_uv0;
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#endif
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void main () {
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vec4 pos = vec4(a_position, 1);
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#if CC_USE_MODEL
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pos = cc_matViewProj * cc_matWorld * pos;
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#else
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pos = cc_matViewProj * pos;
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#endif
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#if USE_TEXTURE
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v_uv0 = a_uv0;
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#endif
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v_color = a_color;
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gl_Position = pos;
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}
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}%
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CCProgram fs %{
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precision highp float;
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#include <alpha-test>
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in vec4 v_color;
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#if USE_TEXTURE
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in vec2 v_uv0;
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uniform sampler2D texture;
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#endif
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#if ENABLE_ROUNDCORNER
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uniform RoundCorner {
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// 圆角x轴半径长度（相对于纹理宽度）
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float xRadius;
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// 圆角y轴半径长度（相对于纹理高度）
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float yRadius;
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}
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#endif
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void main () {
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vec4 o = vec4(1, 1, 1, 1);
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#if USE_TEXTURE
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o *= texture(texture, v_uv0);
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#if CC_USE_ALPHA_ATLAS_TEXTURE
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o.a *= texture2D(texture, v_uv0 + vec2(0, 0.5)).r;
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#endif
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#endif
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o *= v_color;
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ALPHA_TEST(o);
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#if ENABLE_ROUNDCORNER
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// 约束圆角半径范围在 [0.0, 0.5]
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//
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// 请注意这里我是用椭圆前缀去命名的半径
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//
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// 为什么是椭圆？
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//
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// 因为圆角，相对于长方形的纹理的宽高来说，归一化后值并不一样，不是圆，而是一个椭圆
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//
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// 比如：
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//
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// 纹理是 200 x 100 的像素，圆角半径是20像素，那么归一化后
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// X轴上的半径就是 20 / 200 = 0.1
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// Y轴上的半径就是 20 / 100 = 0.2
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//
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// 这就会变成是椭圆，而不是圆
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float ellipseXRadius = clamp(0.0, 0.5, xRadius);
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float ellipseYRadius = clamp(0.0, 0.5, yRadius);
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// 将纹理uv往左上偏移，实现偏移后的坐标系原点在纹理中心
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vec2 uv = v_uv0.xy - vec2(0.5, 0.5);
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// uv.x , uv.y : 为偏移后的的uv
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// abs(uv.x) , abs(uv.y) : 将第二、三、四象限的点都投影到第一象限上，这样子只需要处理第一象限的情况就可以，简化判断
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// 0.5 - radius : 计算出第一象限的圆角所在圆的圆心坐标
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// (rx, ry) : 偏移映射后的 新的uv 坐标，相对于 第一象限圆角坐在圆心坐标 的相对坐标
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float rx = abs(uv.x) - (0.5 - ellipseXRadius);
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float ry = abs(uv.y) - (0.5 - ellipseYRadius);
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// 区分 以第一象限圆角所在圆心坐标为原点的坐标的四个象限
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//
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// 第一象限 mx = 1, my = 1
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// 第二象限 mx = 0, my = 1
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// 第三象限 mx = 0, my = 0
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// 第四象限 mx = 1, my = 0
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//
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// 当 mx * my 时，只要等于1，那就是标识第一象限（实际对应圆角区域所在矩形），否则就是第二、三、四象限
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float mx = step(0.5 - ellipseXRadius, abs(uv.x));
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float my = step(0.5 - ellipseYRadius, abs(uv.y));
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// 判断点(rx, ry)是否在椭圆外部（应用椭圆公式）
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float isOutOfEllipse = step(1.0, pow(rx, 2.0) / pow(max(xRadius, yRadius), 2.0) + pow(ry, 2.0) / pow(min(xRadius, yRadius), 2.0));
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// mx * my = 0 时，代表非椭圆角区域，alpha 值为1，代表完全采用原始纹理的透明度
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// mx * my = 1 时，代表椭圆角所在矩形区域
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// isOutOfEllipse:
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// 当点在椭圆外部时，此值为1，导致 alpha 最终值为0.0，即表示不显示椭圆外部的像素
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// 当点在椭圆内部时，此值为0，导致 alpha 最终值为1.0，即表示显示椭圆内部的像素
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float alpha = 1.0 - mx * my * isOutOfEllipse;
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o = vec4(o.rgb, o.a * alpha);
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#endif
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gl_FragColor = o;
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}
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}%
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assets/effects/sprite-round-corner-crop-v2.effect.meta
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assets/effects/sprite-round-corner-crop-v2.effect.meta
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{
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"ver": "1.0.23",
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"uuid": "7c24b57e-e819-4fc9-a8d2-b06cf61b782d",
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"compiledShaders": [
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{
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"glsl1": {
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"vert": "\nprecision highp float;\nuniform mat4 cc_matViewProj;\nuniform mat4 cc_matWorld;\n\nattribute vec3 a_position;\nattribute vec4 a_color;\nvarying vec4 v_color;\n\n#if USE_TEXTURE\nattribute vec2 a_uv0;\nvarying vec2 v_uv0;\n#endif\n\nvoid main () {\n vec4 pos = vec4(a_position, 1);\n\n #if CC_USE_MODEL\n pos = cc_matViewProj * cc_matWorld * pos;\n #else\n pos = cc_matViewProj * pos;\n #endif\n\n #if USE_TEXTURE\n v_uv0 = a_uv0;\n #endif\n\n v_color = a_color;\n\n gl_Position = pos;\n}\n",
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"frag": "\nprecision highp float;\n\n#if USE_ALPHA_TEST\n \n uniform float alphaThreshold;\n#endif\n\nvoid ALPHA_TEST (in vec4 color) {\n #if USE_ALPHA_TEST\n if (color.a < alphaThreshold) discard;\n #endif\n}\n\nvoid ALPHA_TEST (in float alpha) {\n #if USE_ALPHA_TEST\n if (alpha < alphaThreshold) discard;\n #endif\n}\n\nvarying vec4 v_color;\n\n#if USE_TEXTURE\nvarying vec2 v_uv0;\nuniform sampler2D texture;\n#endif\n\n#if ENABLE_ROUNDCORNER\nuniform float xRadius;\nuniform float yRadius;\n#endif\n\nvoid main () {\n vec4 o = vec4(1, 1, 1, 1);\n\n #if USE_TEXTURE\n o *= texture2D(texture, v_uv0);\n #if CC_USE_ALPHA_ATLAS_TEXTURE\n o.a *= texture2D(texture, v_uv0 + vec2(0, 0.5)).r;\n #endif\n #endif\n\n o *= v_color;\n\n ALPHA_TEST(o);\n\n #if ENABLE_ROUNDCORNER\n\n float ellipseXRadius = clamp(0.0, 0.5, xRadius);\n float ellipseYRadius = clamp(0.0, 0.5, yRadius);\n\n vec2 uv = v_uv0.xy - vec2(0.5, 0.5);\n\n float rx = abs(uv.x) - (0.5 - ellipseXRadius);\n float ry = abs(uv.y) - (0.5 - ellipseYRadius);\n\n float mx = step(0.5 - ellipseXRadius, abs(uv.x));\n float my = step(0.5 - ellipseYRadius, abs(uv.y));\n\n float isOutOfEllipse = step(1.0, pow(rx, 2.0) / pow(max(xRadius, yRadius), 2.0) + pow(ry, 2.0) / pow(min(xRadius, yRadius), 2.0));\n\n float alpha = 1.0 - mx * my * isOutOfEllipse;\n o = vec4(o.rgb, o.a * alpha);\n #endif\n gl_FragColor = o;\n}\n"
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},
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"glsl3": {
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"vert": "\nprecision highp float;\nuniform CCGlobal {\n vec4 cc_time;\n\n vec4 cc_screenSize;\n\n vec4 cc_screenScale;\n\n vec4 cc_nativeSize;\n\n mat4 cc_matView;\n mat4 cc_matViewInv;\n mat4 cc_matProj;\n mat4 cc_matProjInv;\n mat4 cc_matViewProj;\n mat4 cc_matViewProjInv;\n vec4 cc_cameraPos;\n\n vec4 cc_exposure;\n\n vec4 cc_mainLitDir;\n\n vec4 cc_mainLitColor;\n\n vec4 cc_ambientSky;\n vec4 cc_ambientGround;\n};\nuniform CCLocal {\n mat4 cc_matWorld;\n mat4 cc_matWorldIT;\n};\n\nin vec3 a_position;\nin vec4 a_color;\nout vec4 v_color;\n\n#if USE_TEXTURE\nin vec2 a_uv0;\nout vec2 v_uv0;\n#endif\n\nvoid main () {\n vec4 pos = vec4(a_position, 1);\n\n #if CC_USE_MODEL\n pos = cc_matViewProj * cc_matWorld * pos;\n #else\n pos = cc_matViewProj * pos;\n #endif\n\n #if USE_TEXTURE\n v_uv0 = a_uv0;\n #endif\n\n v_color = a_color;\n\n gl_Position = pos;\n}\n",
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"frag": "\nprecision highp float;\n\n#if USE_ALPHA_TEST\n \n uniform ALPHA_TEST {\n float alphaThreshold;\n }\n#endif\n\nvoid ALPHA_TEST (in vec4 color) {\n #if USE_ALPHA_TEST\n if (color.a < alphaThreshold) discard;\n #endif\n}\n\nvoid ALPHA_TEST (in float alpha) {\n #if USE_ALPHA_TEST\n if (alpha < alphaThreshold) discard;\n #endif\n}\n\nin vec4 v_color;\n\n#if USE_TEXTURE\nin vec2 v_uv0;\nuniform sampler2D texture;\n#endif\n\n#if ENABLE_ROUNDCORNER\nuniform RoundCorner {\n\n float xRadius;\n\n float yRadius;\n}\n#endif\n\nvoid main () {\n vec4 o = vec4(1, 1, 1, 1);\n\n #if USE_TEXTURE\n o *= texture(texture, v_uv0);\n #if CC_USE_ALPHA_ATLAS_TEXTURE\n o.a *= texture2D(texture, v_uv0 + vec2(0, 0.5)).r;\n #endif\n #endif\n\n o *= v_color;\n\n ALPHA_TEST(o);\n\n #if ENABLE_ROUNDCORNER\n\n float ellipseXRadius = clamp(0.0, 0.5, xRadius);\n float ellipseYRadius = clamp(0.0, 0.5, yRadius);\n\n vec2 uv = v_uv0.xy - vec2(0.5, 0.5);\n\n float rx = abs(uv.x) - (0.5 - ellipseXRadius);\n float ry = abs(uv.y) - (0.5 - ellipseYRadius);\n\n float mx = step(0.5 - ellipseXRadius, abs(uv.x));\n float my = step(0.5 - ellipseYRadius, abs(uv.y));\n\n float isOutOfEllipse = step(1.0, pow(rx, 2.0) / pow(max(xRadius, yRadius), 2.0) + pow(ry, 2.0) / pow(min(xRadius, yRadius), 2.0));\n\n float alpha = 1.0 - mx * my * isOutOfEllipse;\n o = vec4(o.rgb, o.a * alpha);\n #endif\n gl_FragColor = o;\n}\n"
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}
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}
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],
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"subMetas": {}
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}
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