2014/10/15 下午 10:09:48

iphone Programming Glossary: gl_projection

Drawing into OpenGL ES framebuffer and getting UIImage from it on iPhone

http://stackoverflow.com/questions/10936157/drawing-into-opengl-es-framebuffer-and-getting-uiimage-from-it-on-iphone

the second I did not set model and projection matricies if I use 1.1 glViewport 0 0 width height glMatrixMode GL_PROJECTION glLoadIdentity glOrthof 1.0f 1.0f 1.5f 1.5f 1.0f 1.0f glMatrixMode GL_MODELVIEW after this all works share improve this..

OpenGL ES; rendering texture created from CGBitmapContext

http://stackoverflow.com/questions/2713890/opengl-es-rendering-texture-created-from-cgbitmapcontext

Just a single render pass initialisation code not shown but works fine for untextured primitives glMatrixMode GL_PROJECTION glLoadIdentity glOrthof 0 xSize 0 ySize 1.0f 1.0f glMatrixMode GL_MODELVIEW glColor4f 1.0f 1.0f 1.0f 1.0f glEnable GL_TEXTURE_2D..

Can example “GLImageProcessing” work with multi filters

http://stackoverflow.com/questions/4375479/can-example-glimageprocessing-work-with-multi-filters

and contrast but it can't work at all can anybody can help me about this thank you for review init glMatrixMode GL_PROJECTION glLoadIdentity glOrthof 0 wide 0 high 1 1 glMatrixMode GL_MODELVIEW glLoadIdentity glScalef wide high 1 glBindTexture GL_TEXTURE_2D..

Why is this OpenGL ES code slow on iPhone?

http://stackoverflow.com/questions/450042/why-is-this-opengl-es-code-slow-on-iphone

const GLshort spriteTexcoords 0 0 1 0 0 1 1 1 void setupView glViewport 0 0 backingWidth backingHeight glMatrixMode GL_PROJECTION glLoadIdentity glOrthof 0.0f backingWidth backingHeight 0.0f 10.0f 10.0f glMatrixMode GL_MODELVIEW glClearColor 0.3f 0.0f..

How can I crop an Image with mask and combine it with another image (background) on iPhone? (OpenGL ES 1.1 is preferred)

http://stackoverflow.com/questions/5299452/how-can-i-crop-an-image-with-mask-and-combine-it-with-another-image-background

1.0 1.0 1.0 renderMask renderTextures void reshape int width int height glViewport 0 0 width height glMatrixMode GL_PROJECTION glLoadIdentity gluOrtho2D 0.0 width 0.0 height glMatrixMode GL_MODELVIEW window_size 0 width window_size 1 height This shows..

In OpenGL ES, how do I convert screen coordinates to world coordinates?

http://stackoverflow.com/questions/611468/in-opengl-es-how-do-i-convert-screen-coordinates-to-world-coordinates

don't need to convert at all This goes in your init code somewhere Set up 480x320 orthographic projection glMatrixMode GL_PROJECTION glLoadIdentity glOrthof 240.0f 240.0f 160.0f 160.0f 1.0f 1.0f Rotate into landscape mode glMatrixMode GL_MODELVIEW glLoadIdentity..

GLImageProcessing Multiple Filters?

http://stackoverflow.com/questions/6425861/glimageprocessing-multiple-filters

by downsampling to half size #define NUM_FILTERS sizeof filter sizeof filter 0 rt_assert mode NUM_FILTERS glMatrixMode GL_PROJECTION glLoadIdentity glOrthof 0 wide 0 high 1 1 glMatrixMode GL_MODELVIEW glLoadIdentity glScalef wide high 1 glBindTexture GL_TEXTURE_2D..

Save OpenGL Drawn item as a Image

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

longer needed free brushData Set the view's scale factor self.contentScaleFactor 1.0 Setup OpenGL states glMatrixMode GL_PROJECTION CGRect frame self.bounds CGFloat scale self.contentScaleFactor Setup the view port in Pixels glOrthof 0 frame.size.width..

Record the drawing as a m4v video file - OpenGL

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