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Problem glTexGen in Open GL ES 2.0

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问题 I have a problem somehow similar to this post : glTexGen in OpenGL ES 2.0 I've looked up on the web a couple of other websites without finding out how to solve my issue. Basically, I want to map a texture onto a 2D quad after having set up an orthographic projection. The problem I have is that the texture is distorted as you can see on this picture where I used a coloured pattern instead of a texture: I would like the lines of the texture to stay straight on the quad, but as you can see, they

Drawing Stippled Lines using OpenGL-ES

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问题 I have an application that draws 3-d map view marked up lines that show various features. I am porting the map over to an OpenGL-ES architecture, but am having a bit of trouble working out how to display dashed lines. Doing a lot of googling, I've found many references to the idea that drawing dashed lines and polygons were removed from OpenGL-ES as they can be easily emulated using textures triangles. That's great, but I can't find anyone that actually does this emulation and/or has a

glTexGen in OpenGL ES 2.0

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问题 I have been trying for several hours to implement a GLSL replacement for glTexGen with GL_OBJECT_LINEAR. For OpenGL ES 2.0. In Ogl GLSL there is the gl_TextureMatrix that makes this easier, but thats not available on OpenGL ES 2.0 / OpenGL ES Shader Language 1.0 Several sites have mentioned that this should be "easy" to do in a GLSL vert shader. But I just can not get it to work. My hunch is that I'm not setting the planes up correctly, or I'm missing something in my understanding. I've pored

OpenGL vs OpenGL ES 2.0 - Can an OpenGL Application Be Easily Ported?

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问题 I am working on a gaming framework of sorts, and am a newcomer to OpenGL. Most books seem to not give a terribly clear answer to this question, and I want to develop on my desktop using OpenGL, but execute the code in an OpenGL ES 2.0 environment. My question is twofold then: If I target my framework for OpenGL on the desktop, will it just run without modification in an OpenGL ES 2.0 environment? If not, then is there a good emulator out there, PC or Mac; is there a script that I can run that

OpenGL vs OpenGL ES 2.0 - Can an OpenGL Application Be Easily Ported?

阅读更多关于 OpenGL vs OpenGL ES 2.0 - Can an OpenGL Application Be Easily Ported?

I am working on a gaming framework of sorts, and am a newcomer to OpenGL. Most books seem to not give a terribly clear answer to this question, and I want to develop on my desktop using OpenGL, but execute the code in an OpenGL ES 2.0 environment. My question is twofold then: If I target my framework for OpenGL on the desktop, will it just run without modification in an OpenGL ES 2.0 environment? If not, then is there a good emulator out there, PC or Mac; is there a script that I can run that will convert my OpenGL code into OpenGL ES code, or flag things that won't work? Ivan Vučica It's been