Test_Project_Cocos/CocosCreator-Shader-Effect-Demo
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完善内发光effect

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caizhitao 2019-12-23 23:34:57 +08:00
parent e3905b9c0a
commit 4d84ee0748
2 changed files with 45 additions and 36 deletions
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77
assets/effects/glow-inner.effect
View File

@ -14,8 +14,8 @@ CCEffect %{
properties: properties:
texture: { value: white } texture: { value: white }
alphaThreshold: { value: 0.5 } alphaThreshold: { value: 0.5 }
glowColor: { value: [1.0, 1.0, 0.0, 1.0], editor: { type: color } } glowColor: { value: [1.0, 1.0, 0.0, 1.0], editor: { type: color , displayName: "发光颜色" } }
glowColorSize: { value: 0.01 } glowColorSize: { value: 0.01, editor: {displayName: "发光宽度（百分比）" } }
}% }%
@ -80,64 +80,73 @@ CCProgram fs %{
* 获取指定角度方向，距离为xxx的像素的透明度 * 获取指定角度方向，距离为xxx的像素的透明度
* *
* @param angle 角度 [0.0, 360.0] * @param angle 角度 [0.0, 360.0]
* @param distance 距离 [0.0, 1.0] * @param dist 距离 [0.0, 1.0]
* *
* @return alpha [0.0, 1.0] * @return alpha [0.0, 1.0]
*/ */
float getColorAlpha(float angle, float distance) { float getColorAlpha(float angle, float dist) {
// 角度转弧度，公式为：弧度 = 角度 * (pi / 180) // 角度转弧度，公式为：弧度 = 角度 * (pi / 180)
float radian = angle * 0.01745329252; // 这个浮点数是 pi / 180 float radian = angle * 0.01745329252; // 这个浮点数是 pi / 180
vec4 color = texture(texture, v_uv0 + vec2(distance * cos(radian), distance * sin(radian))); vec4 color = texture(texture, v_uv0 + vec2(dist * cos(radian), dist * sin(radian)));
return color.a; return color.a;
} }
/** /**
* 获取指定距离的周边像素的透明度平均值 * 获取指定距离的周边像素的透明度平均值
* *
* @param distance 距离 [0.0, 1.0] * @param dist 距离 [0.0, 1.0]
* *
* @return average alpha [0.0, 1.0] * @return average alpha [0.0, 1.0]
*/ */
float getDistanceAverageAlpha(float distance) { float getAverageAlpha(float dist) {
float totalAlpha = 0.0; float totalAlpha = 0.0;
totalAlpha += getColorAlpha(0.0, distance); // 以30度为一个单位，那么「周边」就由0到360度中共计12个点的组成
totalAlpha += getColorAlpha(30.0, distance); totalAlpha += getColorAlpha(0.0, dist);
totalAlpha += getColorAlpha(60.0, distance); totalAlpha += getColorAlpha(30.0, dist);
totalAlpha += getColorAlpha(90.0, distance); totalAlpha += getColorAlpha(60.0, dist);
totalAlpha += getColorAlpha(120.0, distance); totalAlpha += getColorAlpha(90.0, dist);
totalAlpha += getColorAlpha(150.0, distance); totalAlpha += getColorAlpha(120.0, dist);
totalAlpha += getColorAlpha(180.0, distance); totalAlpha += getColorAlpha(150.0, dist);
totalAlpha += getColorAlpha(210.0, distance); totalAlpha += getColorAlpha(180.0, dist);
totalAlpha += getColorAlpha(240.0, distance); totalAlpha += getColorAlpha(210.0, dist);
totalAlpha += getColorAlpha(270.0, distance); totalAlpha += getColorAlpha(240.0, dist);
totalAlpha += getColorAlpha(300.0, distance); totalAlpha += getColorAlpha(270.0, dist);
totalAlpha += getColorAlpha(330.0, distance); totalAlpha += getColorAlpha(300.0, dist);
return totalAlpha * (1.0 / 12.0); totalAlpha += getColorAlpha(330.0, dist);
// 1 / 12 = 0.08333
return totalAlpha * 0.0833;
} }
/** /**
* 获取发光的透明度 * 获取发光的透明度
*/ */
float getGlowAlpha() { float getGlowAlpha() {
// 原来已经透明的点不处理 // 如果发光宽度为0
if (glowColorSize == 0.0) {
return 0.0;
}
// 原来已经接近透明的点不处理
// 一般图像边缘会有一些半透明点，这些透明点我们不处理，让它保持原样，否则就是会有内描边效果
vec4 srcColor = texture(texture, v_uv0); vec4 srcColor = texture(texture, v_uv0);
if (srcColor.a < 0.0000000001) { if (srcColor.a < 0.1) {
return srcColor.a; return srcColor.a;
} }
// 处理原来不透明的点，求周边平均透明度 // 将传入的指定距离，平均分成10圈，求出每一圈的平均透明度，
// 然后求和取平均值，那么就可以得到该点的平均透明度
float totalAlpha = 0.0; float totalAlpha = 0.0;
totalAlpha += getDistanceAverageAlpha(glowColorSize * 0.1); totalAlpha += getAverageAlpha(glowColorSize * 0.1);
totalAlpha += getDistanceAverageAlpha(glowColorSize * 0.2); totalAlpha += getAverageAlpha(glowColorSize * 0.2);
totalAlpha += getDistanceAverageAlpha(glowColorSize * 0.3); totalAlpha += getAverageAlpha(glowColorSize * 0.3);
totalAlpha += getDistanceAverageAlpha(glowColorSize * 0.4); totalAlpha += getAverageAlpha(glowColorSize * 0.4);
totalAlpha += getDistanceAverageAlpha(glowColorSize * 0.5); totalAlpha += getAverageAlpha(glowColorSize * 0.5);
totalAlpha += getDistanceAverageAlpha(glowColorSize * 0.6); totalAlpha += getAverageAlpha(glowColorSize * 0.6);
totalAlpha += getDistanceAverageAlpha(glowColorSize * 0.7); totalAlpha += getAverageAlpha(glowColorSize * 0.7);
totalAlpha += getDistanceAverageAlpha(glowColorSize * 0.8); totalAlpha += getAverageAlpha(glowColorSize * 0.8);
totalAlpha += getDistanceAverageAlpha(glowColorSize * 0.9); totalAlpha += getAverageAlpha(glowColorSize * 0.9);
totalAlpha += getDistanceAverageAlpha(glowColorSize * 1.0); totalAlpha += getAverageAlpha(glowColorSize * 1.0);
return totalAlpha * (1.0 / 10.0); return totalAlpha * 0.1;
} }
#endif #endif

4
assets/effects/glow-inner.effect.meta
View File

@ -5,11 +5,11 @@
{ {
"glsl1": { "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 USE_TEXTURE\n v_uv0 = a_uv0;\n #endif\n\n v_color = a_color;\n\n gl_Position = pos;\n}\n", "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",
"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 SHOW_INNER_GLOW\n\nuniform vec4 glowColor;\nuniform float glowColorSize;\n\n/**\n * 获取指定角度方向，距离为xxx的像素的透明度\n *\n * @param angle 角度 [0.0, 360.0]\n * @param distance 距离 [0.0, 1.0]\n *\n * @return alpha [0.0, 1.0]\n */\nfloat getColorAlpha(float angle, float distance) {\n\n float radian = angle * 0.01745329252;\n\n vec4 color = texture2D(texture, v_uv0 + vec2(distance * cos(radian), distance * sin(radian))); \n return color.a;\n}\n\n/**\n * 获取指定距离的周边像素的透明度平均值\n *\n * @param distance 距离 [0.0, 1.0]\n *\n * @return average alpha [0.0, 1.0]\n */\nfloat getDistanceAverageAlpha(float distance) {\n float totalAlpha = 0.0;\n totalAlpha += getColorAlpha(0.0, distance);\n totalAlpha += getColorAlpha(30.0, distance);\n totalAlpha += getColorAlpha(60.0, distance);\n totalAlpha += getColorAlpha(90.0, distance);\n totalAlpha += getColorAlpha(120.0, distance);\n totalAlpha += getColorAlpha(150.0, distance);\n totalAlpha += getColorAlpha(180.0, distance);\n totalAlpha += getColorAlpha(210.0, distance);\n totalAlpha += getColorAlpha(240.0, distance);\n totalAlpha += getColorAlpha(270.0, distance);\n totalAlpha += getColorAlpha(300.0, distance);\n totalAlpha += getColorAlpha(330.0, distance);\n return totalAlpha * (1.0 / 12.0);\n}\n\n/**\n * 获取发光的透明度\n */\nfloat getGlowAlpha() {\n\n vec4 srcColor = texture2D(texture, v_uv0);\n if (srcColor.a < 0.0000000001) {\n return srcColor.a;\n }\n\n float totalAlpha = 0.0;\n totalAlpha += getDistanceAverageAlpha(glowColorSize * 0.1);\n totalAlpha += getDistanceAverageAlpha(glowColorSize * 0.2);\n totalAlpha += getDistanceAverageAlpha(glowColorSize * 0.3);\n totalAlpha += getDistanceAverageAlpha(glowColorSize * 0.4);\n totalAlpha += getDistanceAverageAlpha(glowColorSize * 0.5);\n totalAlpha += getDistanceAverageAlpha(glowColorSize * 0.6);\n totalAlpha += getDistanceAverageAlpha(glowColorSize * 0.7);\n totalAlpha += getDistanceAverageAlpha(glowColorSize * 0.8);\n totalAlpha += getDistanceAverageAlpha(glowColorSize * 0.9);\n totalAlpha += getDistanceAverageAlpha(glowColorSize * 1.0);\n return totalAlpha * (1.0 / 10.0);\n}\n\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 gl_FragColor = o;\n\n #if SHOW_INNER_GLOW\n\n vec4 color_dest = o;\n\n float alpha = getGlowAlpha();\n\n if (alpha > 0.1) {\n alpha = 1.0 - alpha;\n\n alpha = -1.0 * (alpha - 1.0) * (alpha - 1.0) * (alpha - 1.0) * (alpha - 1.0) + 1.0;\n }\n vec4 color_src = glowColor * alpha;\n\n gl_FragColor = color_src * color_src.a + color_dest;\n #endif\n}\n" "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 SHOW_INNER_GLOW\n\nuniform vec4 glowColor;\nuniform float glowColorSize;\n\n/**\n * 获取指定角度方向，距离为xxx的像素的透明度\n *\n * @param angle 角度 [0.0, 360.0]\n * @param dist 距离 [0.0, 1.0]\n *\n * @return alpha [0.0, 1.0]\n */\nfloat getColorAlpha(float angle, float dist) {\n\n float radian = angle * 0.01745329252;\n\n vec4 color = texture2D(texture, v_uv0 + vec2(dist * cos(radian), dist * sin(radian))); \n return color.a;\n}\n\n/**\n * 获取指定距离的周边像素的透明度平均值\n *\n * @param dist 距离 [0.0, 1.0]\n *\n * @return average alpha [0.0, 1.0]\n */\nfloat getAverageAlpha(float dist) {\n float totalAlpha = 0.0;\n\n totalAlpha += getColorAlpha(0.0, dist);\n totalAlpha += getColorAlpha(30.0, dist);\n totalAlpha += getColorAlpha(60.0, dist);\n totalAlpha += getColorAlpha(90.0, dist);\n totalAlpha += getColorAlpha(120.0, dist);\n totalAlpha += getColorAlpha(150.0, dist);\n totalAlpha += getColorAlpha(180.0, dist);\n totalAlpha += getColorAlpha(210.0, dist);\n totalAlpha += getColorAlpha(240.0, dist);\n totalAlpha += getColorAlpha(270.0, dist);\n totalAlpha += getColorAlpha(300.0, dist);\n totalAlpha += getColorAlpha(330.0, dist);\n\n return totalAlpha * 0.0833; \n}\n\n/**\n * 获取发光的透明度\n */\nfloat getGlowAlpha() {\n\n if (glowColorSize == 0.0) {\n return 0.0;\n }\n\n vec4 srcColor = texture2D(texture, v_uv0);\n if (srcColor.a < 0.1) {\n return srcColor.a;\n }\n\n float totalAlpha = 0.0;\n totalAlpha += getAverageAlpha(glowColorSize * 0.1);\n totalAlpha += getAverageAlpha(glowColorSize * 0.2);\n totalAlpha += getAverageAlpha(glowColorSize * 0.3);\n totalAlpha += getAverageAlpha(glowColorSize * 0.4);\n totalAlpha += getAverageAlpha(glowColorSize * 0.5);\n totalAlpha += getAverageAlpha(glowColorSize * 0.6);\n totalAlpha += getAverageAlpha(glowColorSize * 0.7);\n totalAlpha += getAverageAlpha(glowColorSize * 0.8);\n totalAlpha += getAverageAlpha(glowColorSize * 0.9);\n totalAlpha += getAverageAlpha(glowColorSize * 1.0);\n return totalAlpha * 0.1;\n}\n\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 gl_FragColor = o;\n\n #if SHOW_INNER_GLOW\n\n vec4 color_dest = o;\n\n float alpha = getGlowAlpha();\n\n if (alpha > 0.1) {\n alpha = 1.0 - alpha;\n\n alpha = -1.0 * (alpha - 1.0) * (alpha - 1.0) * (alpha - 1.0) * (alpha - 1.0) + 1.0;\n }\n vec4 color_src = glowColor * alpha;\n\n gl_FragColor = color_src * color_src.a + color_dest;\n #endif\n}\n"
}, },
"glsl3": { "glsl3": {
"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", "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",
"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 SHOW_INNER_GLOW\n\nuniform glow {\n\n vec4 glowColor;\n\n float glowColorSize;\n\n};\n\n/**\n * 获取指定角度方向，距离为xxx的像素的透明度\n *\n * @param angle 角度 [0.0, 360.0]\n * @param distance 距离 [0.0, 1.0]\n *\n * @return alpha [0.0, 1.0]\n */\nfloat getColorAlpha(float angle, float distance) {\n\n float radian = angle * 0.01745329252;\n\n vec4 color = texture(texture, v_uv0 + vec2(distance * cos(radian), distance * sin(radian))); \n return color.a;\n}\n\n/**\n * 获取指定距离的周边像素的透明度平均值\n *\n * @param distance 距离 [0.0, 1.0]\n *\n * @return average alpha [0.0, 1.0]\n */\nfloat getDistanceAverageAlpha(float distance) {\n float totalAlpha = 0.0;\n totalAlpha += getColorAlpha(0.0, distance);\n totalAlpha += getColorAlpha(30.0, distance);\n totalAlpha += getColorAlpha(60.0, distance);\n totalAlpha += getColorAlpha(90.0, distance);\n totalAlpha += getColorAlpha(120.0, distance);\n totalAlpha += getColorAlpha(150.0, distance);\n totalAlpha += getColorAlpha(180.0, distance);\n totalAlpha += getColorAlpha(210.0, distance);\n totalAlpha += getColorAlpha(240.0, distance);\n totalAlpha += getColorAlpha(270.0, distance);\n totalAlpha += getColorAlpha(300.0, distance);\n totalAlpha += getColorAlpha(330.0, distance);\n return totalAlpha * (1.0 / 12.0);\n}\n\n/**\n * 获取发光的透明度\n */\nfloat getGlowAlpha() {\n\n vec4 srcColor = texture(texture, v_uv0);\n if (srcColor.a < 0.0000000001) {\n return srcColor.a;\n }\n\n float totalAlpha = 0.0;\n totalAlpha += getDistanceAverageAlpha(glowColorSize * 0.1);\n totalAlpha += getDistanceAverageAlpha(glowColorSize * 0.2);\n totalAlpha += getDistanceAverageAlpha(glowColorSize * 0.3);\n totalAlpha += getDistanceAverageAlpha(glowColorSize * 0.4);\n totalAlpha += getDistanceAverageAlpha(glowColorSize * 0.5);\n totalAlpha += getDistanceAverageAlpha(glowColorSize * 0.6);\n totalAlpha += getDistanceAverageAlpha(glowColorSize * 0.7);\n totalAlpha += getDistanceAverageAlpha(glowColorSize * 0.8);\n totalAlpha += getDistanceAverageAlpha(glowColorSize * 0.9);\n totalAlpha += getDistanceAverageAlpha(glowColorSize * 1.0);\n return totalAlpha * (1.0 / 10.0);\n}\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 gl_FragColor = o;\n\n #if SHOW_INNER_GLOW\n\n vec4 color_dest = o;\n\n float alpha = getGlowAlpha();\n\n if (alpha > 0.1) {\n alpha = 1.0 - alpha;\n\n alpha = -1.0 * (alpha - 1.0) * (alpha - 1.0) * (alpha - 1.0) * (alpha - 1.0) + 1.0;\n }\n vec4 color_src = glowColor * alpha;\n\n gl_FragColor = color_src * color_src.a + color_dest;\n #endif\n}\n" "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 SHOW_INNER_GLOW\n\nuniform glow {\n\n vec4 glowColor;\n\n float glowColorSize;\n\n};\n\n/**\n * 获取指定角度方向，距离为xxx的像素的透明度\n *\n * @param angle 角度 [0.0, 360.0]\n * @param dist 距离 [0.0, 1.0]\n *\n * @return alpha [0.0, 1.0]\n */\nfloat getColorAlpha(float angle, float dist) {\n\n float radian = angle * 0.01745329252;\n\n vec4 color = texture(texture, v_uv0 + vec2(dist * cos(radian), dist * sin(radian))); \n return color.a;\n}\n\n/**\n * 获取指定距离的周边像素的透明度平均值\n *\n * @param dist 距离 [0.0, 1.0]\n *\n * @return average alpha [0.0, 1.0]\n */\nfloat getAverageAlpha(float dist) {\n float totalAlpha = 0.0;\n\n totalAlpha += getColorAlpha(0.0, dist);\n totalAlpha += getColorAlpha(30.0, dist);\n totalAlpha += getColorAlpha(60.0, dist);\n totalAlpha += getColorAlpha(90.0, dist);\n totalAlpha += getColorAlpha(120.0, dist);\n totalAlpha += getColorAlpha(150.0, dist);\n totalAlpha += getColorAlpha(180.0, dist);\n totalAlpha += getColorAlpha(210.0, dist);\n totalAlpha += getColorAlpha(240.0, dist);\n totalAlpha += getColorAlpha(270.0, dist);\n totalAlpha += getColorAlpha(300.0, dist);\n totalAlpha += getColorAlpha(330.0, dist);\n\n return totalAlpha * 0.0833; \n}\n\n/**\n * 获取发光的透明度\n */\nfloat getGlowAlpha() {\n\n if (glowColorSize == 0.0) {\n return 0.0;\n }\n\n vec4 srcColor = texture(texture, v_uv0);\n if (srcColor.a < 0.1) {\n return srcColor.a;\n }\n\n float totalAlpha = 0.0;\n totalAlpha += getAverageAlpha(glowColorSize * 0.1);\n totalAlpha += getAverageAlpha(glowColorSize * 0.2);\n totalAlpha += getAverageAlpha(glowColorSize * 0.3);\n totalAlpha += getAverageAlpha(glowColorSize * 0.4);\n totalAlpha += getAverageAlpha(glowColorSize * 0.5);\n totalAlpha += getAverageAlpha(glowColorSize * 0.6);\n totalAlpha += getAverageAlpha(glowColorSize * 0.7);\n totalAlpha += getAverageAlpha(glowColorSize * 0.8);\n totalAlpha += getAverageAlpha(glowColorSize * 0.9);\n totalAlpha += getAverageAlpha(glowColorSize * 1.0);\n return totalAlpha * 0.1;\n}\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 gl_FragColor = o;\n\n #if SHOW_INNER_GLOW\n\n vec4 color_dest = o;\n\n float alpha = getGlowAlpha();\n\n if (alpha > 0.1) {\n alpha = 1.0 - alpha;\n\n alpha = -1.0 * (alpha - 1.0) * (alpha - 1.0) * (alpha - 1.0) * (alpha - 1.0) + 1.0;\n }\n vec4 color_src = glowColor * alpha;\n\n gl_FragColor = color_src * color_src.a + color_dest;\n #endif\n}\n"
} }
} }
], ],