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2014/10/15 ¤U¤È 10:10:27
iphone Programming Glossary: inputtexturetopHow do I blend two textures with different co-ordinates in OpenGL ES 2.0 on iPhone? http://stackoverflow.com/questions/12242443/how-do-i-blend-two-textures-with-different-co-ordinates-in-opengl-es-2-0-on-ipho glBindTexture GL_TEXTURE_2D textureTop glActiveTexture GL_TEXTURE3 glBindTexture GL_TEXTURE_2D textureBot glUniform1i inputTextureTop 2 glUniform1i inputTextureBot 3 glUniform1f alphaTop alpha glEnable GL_BLEND glBlendFunc GL_SRC_ALPHA GL_ONE_MINUS_SRC_ALPHA.. textureCoordinate inputTextureCoordinate.xy Fragment shader... varying highp vec2 textureCoordinate uniform sampler2D inputTextureTop uniform sampler2D inputTextureBot uniform highp float alphaTop void main lowp vec4 pixelTop texture2D inputTextureTop textureCoordinate.. inputTextureTop uniform sampler2D inputTextureBot uniform highp float alphaTop void main lowp vec4 pixelTop texture2D inputTextureTop textureCoordinate lowp vec4 pixelBot texture2D inputTextureBot textureCoordinate gl_FragColor someBlendOperation pixelTop..
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