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2014/10/15 ¤U¤È 10:09:43
iphone Programming Glossary: gl_blendHow 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 CGRect rect glClearColor 1 1 1 1 glClear GL_COLOR_BUFFER_BIT glBlendFunc GL_SRC_ALPHA GL_ONE_MINUS_SRC_ALPHA glEnable GL_BLEND Condition satisfied to draw a line code given below otherwise the background and fish image draw in else part. if Test1.. CGRect rect glClearColor 1 1 1 1 glClear GL_COLOR_BUFFER_BIT glBlendFunc GL_SRC_ALPHA GL_ONE_MINUS_SRC_ALPHA glEnable GL_BLEND Condition satisfied to draw a line code given below otherwise the background and fish image draw in else part. if Test1.. CGRect rect glClearColor 1 1 1 1 glClear GL_COLOR_BUFFER_BIT glBlendFunc GL_SRC_ALPHA GL_ONE_MINUS_SRC_ALPHA glEnable GL_BLEND Condition satisfied to draw a line code given below otherwise the background and fish image draw in else part. if Test1..
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 textureBot glUniform1i inputTextureTop 2 glUniform1i 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..
OpenGL ES iPhone - drawing anti aliased lines http://stackoverflow.com/questions/1813035/opengl-es-iphone-drawing-anti-aliased-lines drawing anti aliased lines Normally you'd use something like glBlendFunc GL_SRC_ALPHA GL_ONE_MINUS_SRC_ALPHA glEnable GL_BLEND glEnable GL_LINE_SMOOTH glLineWidth 2.0f glVertexPointer 2 GL_FLOAT 0 points glEnableClientState GL_VERTEX_ARRAY glDrawArrays..
How do I create blurred text in an iPhone view? http://stackoverflow.com/questions/227305/how-do-i-create-blurred-text-in-an-iphone-view GL_TEXTURE_2D GL_TEXTURE_MIN_FILTER GL_LINEAR glTexParameteri GL_TEXTURE_2D GL_TEXTURE_MAG_FILTER GL_LINEAR glEnable GL_BLEND glBlendFunc GL_SRC_ALPHA GL_ONE for i 0 i 4 i tmpquad i .x quad i .s 1.5 offw tmpquad i .y quad i .t 0.5 offh tmpquad i..
Can example “GLImageProcessing” work with multi filters http://stackoverflow.com/questions/4375479/can-example-glimageprocessing-work-with-multi-filters resultFBO glViewport 0 0 result.wide result.s result.high result.t glClear GL_COLOR_BUFFER_BIT glDisable GL_BLEND process 1 adjust brightness float t 1.2 glVertexPointer 2 GL_FLOAT sizeof V2fT2f flipquad 0 .x glTexCoordPointer 2 GL_FLOAT..
http://stackoverflow.com/questions/5299452/how-can-i-crop-an-image-with-mask-and-combine-it-with-another-image-background 2 void renderMask float texture_x 0 texture_y 0 float x 0 y 0 glBindTexture GL_TEXTURE_2D mask_texture glDisable GL_BLEND glBegin GL_QUADS glTexCoord2f texture_x texture_y glVertex2f x y glTexCoord2f texture_x 1.0 texture_y glVertex2f x 512.0.. glTexCoord2f texture_x texture_y 1.0 glVertex2f x y 512.0 glEnd glBindTexture GL_TEXTURE_2D color_texture glEnable GL_BLEND glBlendFunc GL_DST_COLOR GL_ZERO glBegin GL_QUADS glTexCoord2f texture_x texture_y glVertex2f x y glTexCoord2f texture_x.. texture_x texture_y 1.0 glVertex2f x y 512.0 glEnd glBindTexture GL_TEXTURE_2D background_texture glEnable GL_BLEND glBlendFunc GL_ONE_MINUS_DST_COLOR GL_DST_COLOR glBegin GL_QUADS glTexCoord2f texture_x texture_y glVertex2f x y glTexCoord2f..
How can I improve the performance of my custom OpenGL ES 2.0 depth texture generation? http://stackoverflow.com/questions/6051237/how-can-i-improve-the-performance-of-my-custom-opengl-es-2-0-depth-texture-gener but I can't figure out why. In order to achieve the proper generation of this depth texture GL_DEPTH_TEST is disabled GL_BLEND is enabled with glBlendFunc GL_ONE GL_ONE and glBlendEquation is set to GL_MIN_EXT . I know that a scene output in this..
Overlay Color Blend in OpenGL ES / iOS / Cocos2d http://stackoverflow.com/questions/8771413/overlay-color-blend-in-opengl-es-ios-cocos2d this is done using either glEnable GL_ALPHA_TEST glAlphaFunc GL_GEQUAL 0.995 not using 1.0 for some margin or glEnable GL_BLEND glBlendFunc GL_SRC_ALPHA GL_ONE_MINUS_SRC_ALPHA The effects are not created by setting the blend function or mode but by..
Record the drawing as a m4v video file - OpenGL http://stackoverflow.com/questions/9661259/record-the-drawing-as-a-m4v-video-file-opengl glMatrixMode GL_MODELVIEW glDisable GL_DITHER glEnable GL_TEXTURE_2D glEnableClientState GL_VERTEX_ARRAY glEnable GL_BLEND Set a blending function appropriate for premultiplied alpha pixel data glBlendFunc GL_ONE GL_ONE_MINUS_SRC_ALPHA glEnable..
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