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2014/10/15 ¤U¤È 10:15:45

iphone Programming Glossary: vertexcount

OpenGL ES Simple Undo Last Drawing

http://stackoverflow.com/questions/2708055/opengl-es-simple-undo-last-drawing

I then prepare the vertex array and draw this way glVertexPointer 2 GL_FLOAT 0 vertexBuffer glDrawArrays GL_POINTS 0 vertexCount glBindRenderbufferOES GL_RENDERBUFFER_OES viewRenderbuffer context presentRenderbuffer GL_RENDERBUFFER_OES How do I simple..

Changing pen width according writing speed

http://stackoverflow.com/questions/6490057/changing-pen-width-according-writing-speed

used GLPaint of Apple source code to study static GLfloat vertexBuffer NULL static NSUInteger vertexMax 64 NSUInteger vertexCount 0 count i EAGLContext setCurrentContext context glBindFramebufferOES GL_FRAMEBUFFER_OES viewFramebuffer Convert locations.. count MAX ceilf sqrtf end.x start.x end.x start.x end.y start.y end.y start.y kBrushPixelStep 1 for i 0 i count i if vertexCount vertexMax vertexMax 2 vertexMax vertexBuffer realloc vertexBuffer vertexMax 2 sizeof GLfloat vertexBuffer 2 vertexCount.. vertexMax vertexMax 2 vertexMax vertexBuffer realloc vertexBuffer vertexMax 2 sizeof GLfloat vertexBuffer 2 vertexCount 0 start.x end.x start.x GLfloat i GLfloat count vertexBuffer 2 vertexCount 1 start.y end.y start.y GLfloat i GLfloat count..

Undo drawing in Paint Application

http://stackoverflow.com/questions/6689600/undo-drawing-in-paint-application

drawErase CGPoint start toPoint CGPoint end static GLfloat eraseBuffer NULL static NSUInteger eraseMax 64 NSUInteger vertexCount 0 count i EAGLContext setCurrentContext context glBindFramebufferOES GL_FRAMEBUFFER_OES viewFramebuffer Convert locations.. count MAX ceilf sqrtf end.x start.x end.x start.x end.y start.y end.y start.y kBrushPixelStep 1 for i 0 i count i if vertexCount eraseMax eraseMax 2 eraseMax eraseBuffer realloc eraseBuffer eraseMax 2 sizeof GLfloat eraseBuffer 2 vertexCount 0 start.x.. i if vertexCount eraseMax eraseMax 2 eraseMax eraseBuffer realloc eraseBuffer eraseMax 2 sizeof GLfloat eraseBuffer 2 vertexCount 0 start.x end.x start.x GLfloat i GLfloat count eraseBuffer 2 vertexCount 1 start.y end.y start.y GLfloat i GLfloat count..

Save OpenGL Drawn item as a Image

http://stackoverflow.com/questions/9660723/save-opengl-drawn-item-as-a-image

CGPoint start toPoint CGPoint end static GLfloat vertexBuffer NULL static NSUInteger vertexMax 64 NSUInteger vertexCount 0 count i EAGLContext setCurrentContext context glBindFramebufferOES GL_FRAMEBUFFER_OES viewFramebuffer Convert locations.. count MAX ceilf sqrtf end.x start.x end.x start.x end.y start.y end.y start.y kBrushPixelStep 1 for i 0 i count i if vertexCount vertexMax vertexMax 2 vertexMax vertexBuffer realloc vertexBuffer vertexMax 2 sizeof GLfloat vertexBuffer 2 vertexCount.. vertexMax vertexMax 2 vertexMax vertexBuffer realloc vertexBuffer vertexMax 2 sizeof GLfloat vertexBuffer 2 vertexCount 0 start.x end.x start.x GLfloat i GLfloat count vertexBuffer 2 vertexCount 1 start.y end.y start.y GLfloat i GLfloat count..

Record the drawing as a m4v video file - OpenGL

http://stackoverflow.com/questions/9661259/record-the-drawing-as-a-m4v-video-file-opengl

CGPoint start toPoint CGPoint end static GLfloat vertexBuffer NULL static NSUInteger vertexMax 64 NSUInteger vertexCount 0 count i EAGLContext setCurrentContext context glBindFramebufferOES GL_FRAMEBUFFER_OES viewFramebuffer Convert locations.. count MAX ceilf sqrtf end.x start.x end.x start.x end.y start.y end.y start.y kBrushPixelStep 1 for i 0 i count i if vertexCount vertexMax vertexMax 2 vertexMax vertexBuffer realloc vertexBuffer vertexMax 2 sizeof GLfloat vertexBuffer 2 vertexCount.. vertexMax vertexMax 2 vertexMax vertexBuffer realloc vertexBuffer vertexMax 2 sizeof GLfloat vertexBuffer 2 vertexCount 0 start.x end.x start.x GLfloat i GLfloat count vertexBuffer 2 vertexCount 1 start.y end.y start.y GLfloat i GLfloat count..