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2014/10/15 ¤U¤È 10:09:42

iphone Programming Glossary: glvertexattribpointer

How to draw a line inside the fish movement (OpenGLES in iPhone)?

http://stackoverflow.com/questions/10499077/how-to-draw-a-line-inside-the-fish-movement-opengles-in-iphone

the data being copied GL_STATIC_DRAW the usage pattern of the data glEnableVertexAttribArray GLKVertexAttribPosition glVertexAttribPointer GLKVertexAttribPosition 2 number of coordinates per vertex GL_FLOAT the data type of each component GL_FALSE .. GLKVertexAttribPosition glEnableVertexAttribArray GLKVertexAttribTexCoord0 NSLog @ TexturedVertex ld offset glVertexAttribPointer GLKVertexAttribPosition 2 GL_FLOAT GL_FALSE sizeof TexturedVertex void offset offsetof TexturedVertex geometryVertex glVertexAttribPointer.. GLKVertexAttribPosition 2 GL_FLOAT GL_FALSE sizeof TexturedVertex void offset offsetof TexturedVertex geometryVertex glVertexAttribPointer GLKVertexAttribTexCoord0 2 GL_FLOAT GL_FALSE sizeof TexturedVertex void offset offsetof TexturedVertex textureVertex glDrawArrays..

How 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

inputTextureBot 3 glUniform1f alphaTop alpha glEnable GL_BLEND glBlendFunc GL_SRC_ALPHA GL_ONE_MINUS_SRC_ALPHA glVertexAttribPointer position 2 GL_FLOAT 0 0 imageVertices glVertexAttribPointer inputTextureCoordinate 2 GL_FLOAT 0 0 textureCoordinates glClearColor.. GL_BLEND glBlendFunc GL_SRC_ALPHA GL_ONE_MINUS_SRC_ALPHA glVertexAttribPointer position 2 GL_FLOAT 0 0 imageVertices glVertexAttribPointer inputTextureCoordinate 2 GL_FLOAT 0 0 textureCoordinates glClearColor 0.0 0.0 0.0 0.0 glClear GL_COLOR_BUFFER_BIT glDrawArrays.. share improve this question You have to pass 2 texture coordinates to shader and modify shader Add to ObjectiveC glVertexAttribPointer inputTextureCoordinate2 2 GL_FLOAT 0 0 textureCoordinates2 Vertex Shader attribute vec4 position attribute vec4 inputTextureCoordinate..

OpenGL Texture Coordinates in Pixel Space

http://stackoverflow.com/questions/5879403/opengl-texture-coordinates-in-pixel-space

where the texture I'd be using within the atlas is in the upper left 48px square GLshort texcoords 48 48 0 48 48 0 0 0 glVertexAttribPointer ATTRIB_TEXTUREPOSITON 2 GL_SHORT 0 0 texcoords glEnableVertexAttribArray ATTRIB_TEXTUREPOSITON iphone objective c cocoa..

Use of VAO around VBO in Open ES iPhone app Causes EXC_BAD_ACCESS When Call to glDrawElements

http://stackoverflow.com/questions/6240863/use-of-vao-around-vbo-in-open-es-iphone-app-causes-exc-bad-access-when-call-to-g

GL_ARRAY_BUFFER texCoordBuffer glBufferData GL_ARRAY_BUFFER sizeof DirectVertices DirectVertices GL_STATIC_DRAW glVertexAttribPointer directPositionSlot 2 GL_FLOAT GL_FALSE sizeof DirectVertex GLvoid offsetof DirectVertex position glEnableVertexAttribArray.. GL_FALSE sizeof DirectVertex GLvoid offsetof DirectVertex position glEnableVertexAttribArray directPositionSlot glVertexAttribPointer texCoordSlot 2 GL_UNSIGNED_BYTE GL_FALSE sizeof DirectVertex GLvoid offsetof DirectVertex texCoord glEnableVertexAttribArray.. glBindBuffer GL_ARRAY_BUFFER vertexBuffer glBufferData GL_ARRAY_BUFFER sizeof Vertices Vertices GL_STATIC_DRAW glVertexAttribPointer positionSlot 3 GL_FLOAT GL_FALSE sizeof Vertex 0 glEnableVertexAttribArray positionSlot glVertexAttribPointer colorSlot..

Draw a straight line using OpenGL ES in iPhone?

http://stackoverflow.com/questions/9736887/draw-a-straight-line-using-opengl-es-in-iphone

graphics pipeline to be drawn glEnableVertexAttribArray GLKVertexAttribPosition Specify how the GPU looks up the data glVertexAttribPointer GLKVertexAttribPosition the currently bound buffer holds the data 2 number of coordinates per vertex GL_FLOAT the data..