diff --git a/assets/effects/sprite-round-corner-crop.effect b/assets/effects/sprite-round-corner-crop.effect new file mode 100644 index 0000000..e894a2a --- /dev/null +++ b/assets/effects/sprite-round-corner-crop.effect @@ -0,0 +1,144 @@ +// Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd. +// 圆角裁剪 +// 原理：https://www.cnblogs.com/jqm304775992/p/4987793.html +// 代码：复制 yanjifa/shaderDemor 的 https://github.com/yanjifa/shaderDemo/blob/master/assets/Effect/CircleAvatar.effect + +CCEffect %{ + techniques: + - passes: + - vert: vs + frag: fs + blendState: + targets: + - blend: true + rasterizerState: + cullMode: none + properties: + texture: { value: white } + alphaThreshold: { value: 0.5 } + # 圆角半径 + roundCornerRadius: { + value: 0.1, + inspector: { + tooltip: "圆角半径", + range: [0.0, 0.5] + } + } +}% + + +CCProgram vs %{ + precision highp float; + + #include + #include + + in vec3 a_position; + in vec4 a_color; + out vec4 v_color; + + #if USE_TEXTURE + in vec2 a_uv0; + out vec2 v_uv0; + #endif + + void main () { + vec4 pos = vec4(a_position, 1); + + #if CC_USE_MODEL + pos = cc_matViewProj * cc_matWorld * pos; + #else + pos = cc_matViewProj * pos; + #endif + + #if USE_TEXTURE + v_uv0 = a_uv0; + #endif + + v_color = a_color; + + gl_Position = pos; + } +}% + + +CCProgram fs %{ + precision highp float; + + #include + + in vec4 v_color; + + #if USE_TEXTURE + in vec2 v_uv0; + uniform sampler2D texture; + #endif + + #if ENABLE_ROUNDCORNER + uniform RoundCorner { + // 圆角半径 + float roundCornerRadius; + } + #endif + + void main () { + vec4 o = vec4(1, 1, 1, 1); + + #if USE_TEXTURE + o *= texture(texture, v_uv0); + #if CC_USE_ALPHA_ATLAS_TEXTURE + o.a *= texture2D(texture, v_uv0 + vec2(0, 0.5)).r; + #endif + #endif + + o *= v_color; + + ALPHA_TEST(o); + + #if ENABLE_ROUNDCORNER + // 约束圆角半径范围在 [0.0, 0.5] + float radius = clamp(0.0, 0.5, roundCornerRadius); + + // 将纹理uv往左下偏移，实现偏移后的纹理中心点在 OpenGL 坐标系的原点 + vec2 uv = v_uv0.xy - vec2(0.5, 0.5); + + // uv.x , uv.y : 为偏移后的的uv + // 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 + // 0.5 - radius : 计算出第一象限的圆角所在圆的圆心坐标 + // (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 + float rx = abs(uv.x) - (0.5 - radius); + float ry = abs(uv.y) - (0.5 - radius); + + // 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 + // + // 第一象限 mx = 1, my = 1 + // 第二象限 mx = 0, my = 1 + // 第三象限 mx = 0, my = 0 + // 第四象限 mx = 1, my = 0 + // + // 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 + float mx = step(0.5 - radius, abs(uv.x)); + float my = step(0.5 - radius, abs(uv.y)); + + // 计算相对uv坐标到圆心的距离 + float len = length(vec2(rx, ry)); + + // mx * my = 0 时，代表非圆角区域，a 值为1，代表完全采用原始纹理的透明度 + // mx * my = 1 时，代表园所所在矩形区域 + // step(radius, len) 可以区分出圆角所在矩形区域的 圆角区域 和 非圆角区域 + // 其中圆角区域值为0，非圆角区域值为1 + // 当为圆角区域时，a 值为1，代表完全采用原始纹理透明度 + // 当为非圆角区域时，a 值为0，代表完全透明 + // 至此已经实现圆角裁剪 + // + // smoothstep(0., radius * 0.01, len - radius) 是用于抗锯齿优化 + // 原理：针对点在非圆角区域的情况，针对点在大于「圆半径一点点」地方的区域，进行平滑过渡，以实现抗锯齿 + // 其中， + // 「圆半径一点点」用 radius * 0.01 表示（0.01 可自行改变） + // 点在大于圆半径的区域用 len - radius ，此值会在 [0.0, radius * 0.01] 之间时会平滑过渡 + float a = 1.0 - mx * my * step(radius, len) * smoothstep(0., radius * 0.01, len - radius); + o = vec4(o.rgb, o.a * a); + #endif + gl_FragColor = o; + } +}% diff --git a/assets/effects/sprite-round-corner-crop.effect.meta b/assets/effects/sprite-round-corner-crop.effect.meta new file mode 100644 index 0000000..4f9bb47 --- /dev/null +++ b/assets/effects/sprite-round-corner-crop.effect.meta @@ -0,0 +1,17 @@ +{ + "ver": "1.0.23", + "uuid": "a4afedba-5234-44d7-9031-cba83051d521", + "compiledShaders": [ + { + "glsl1": { + "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 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