GLSL学习_高斯滤波

程序员文华技术 2022年11月14日

0 收藏 598 点赞 3,382 浏览 1746 个字

使用RenderMonkey:

从自带的sobel修改的。

vertex:

uniform float height;varying vec4 vTexCoords00;varying vec4 vTexCoords01;varying vec4 vTexCoords02;varying vec4 vTexCoords10;varying vec4 vTexCoords11;varying vec4 vTexCoords12;varying vec4 vTexCoords20;varying vec4 vTexCoords21;varying vec4 vTexCoords22;void main(void){   vec4 Pos = gl_Vertex;   gl_Position = vec4(Pos.xy,, );   vec4 BaseTexCoord;   BaseTexCoord.x = 0.5 * (1.0 - Pos.x);   BaseTexCoord.y = 0.5 * (1.0 + Pos.y);   BaseTexCoord.zw = vec2(0.0, 1.0);   float vOffset = (1.0 / height);   vTexCoords00 = BaseTexCoord + vec4(-vOffset, -vOffset, 0.0, 0.0);   vTexCoords01 = BaseTexCoord + vec4( 0.0,     -vOffset, 0.0, 0.0);   vTexCoords02 = BaseTexCoord + vec4( vOffset, -vOffset, 0.0, 0.0);   vTexCoords10 = BaseTexCoord + vec4(-vOffset,  0.0, 0.0, 0.0);   vTexCoords11 = BaseTexCoord;   vTexCoords12 = BaseTexCoord + vec4( vOffset,  0.0, 0.0, 0.0);   vTexCoords20 = BaseTexCoord + vec4(-vOffset,  vOffset, 0.0, 0.0);   vTexCoords21 = BaseTexCoord + vec4( 0.0,      vOffset, 0.0, 0.0);   vTexCoords22 = BaseTexCoord + vec4( vOffset,  vOffset, 0.0, 0.0);}

Fragment:

uniform sampler2D BaseMap;varying vec4 vTexCoords00;varying vec4 vTexCoords01;varying vec4 vTexCoords02;varying vec4 vTexCoords10;varying vec4 vTexCoords11;varying vec4 vTexCoords12;varying vec4 vTexCoords20;varying vec4 vTexCoords21;varying vec4 vTexCoords22;void main(void){   vec4 s00; vec4 s01; vec4 s02;   vec4 s10; vec4 s11; vec4 s12;   vec4 s20; vec4 s21; vec4 s22;   s00 = texture2DProj(BaseMap, vTexCoords00);   s01 = texture2DProj(BaseMap, vTexCoords01);   s02 = texture2DProj(BaseMap, vTexCoords02);   s10 = texture2DProj(BaseMap, vTexCoords10);   s11=  texture2DProj(BaseMap, vTexCoords11);   s12 = texture2DProj(BaseMap, vTexCoords12);   s20 = texture2DProj(BaseMap, vTexCoords20);   s21 = texture2DProj(BaseMap, vTexCoords21);   s22 = texture2DProj(BaseMap, vTexCoords22);   vec4 re=s00*0.0625+s01*0.125+s02*0.0625+           s10*0.1250+s11*0.250+s12*0.1250+           s20*0.0625+s21*0.125+s22*0.0625;   gl_FragColor = re;}