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HPK

glTextCord2f()?

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I know that a thing like this had been answered in previous posts , but i cant make it work properly so i need to ask again.... I have a 800*800 Bitmap with tiles of 64*64 inside , i need get the coordinates of the tiles , but I can´t make it work , it always render a white square //Texture Coordinates TextPos[0] = 0.0f ; TextPos[1] = 0.0f; TextPos[2] = 0.08f ; TextPos[3] = 0.0f; TextPos[4] = 0.08f ; TextPos[5] = 0.08f; TextPos[6] = 0.0f ; TextPos[7] = 0.08f; [edited by - HPK on August 27, 2002 1:19:17 AM]

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Try resizing the bitmap so that it is power of two, like 512x512. Read some documentation.

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Hmm.. you need to have an OpenGL rendering context before you load and bind textures, otherwise they will all be white. Can you see any other textures ok?

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you should have some problem with an 800*800 image.. do you upload that image as an texture? try a glGetError() after uploading the texture.

the texture coords are calculated as follow 1/texture_width*number_of_pixels_in_tile

/Mikael A

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sorry i didnt put all the code but OpenGl have a long initialization code, yes i checked again and everything is working because if i use 64*64 bitmap and i use the following coordinates teh texutre is displayed correctly, the problem is to take a smaller part of a bitmap...

//coords
0.0 0.0
1.0 0.0
1.0 1.0
0.0 1.0

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