Triangle with a Texture

Graphics and GPU Programming Programming

Started by gamedream January 15, 2004 07:24 PM

1 comment, last by gamedream 20 years, 3 months ago

122

Author

January 15, 2004 07:24 PM

If a triangle or pyrmaid, and I want to paste a texture. what is the value of the vector (tu, tv)? because it don''t have 4 points, therefore, it will not occur (0,0), (1.0), (0,1), (1,1).

QRebound

196

January 15, 2004 08:51 PM

I think you are confused. Let me clear it up for you. You select a point, and then you set its Texture coordinates, or what part of the TEXTURE that will be put there, and then you do that for each point, and then set the Texture in the render function, and draw your objects... so, 0.0f, 0.0f would be upper left corner, 1.0f, 1.0f would be lower right, and 0.5f, 0.5f would be the center of the texture. Hope that helps

QRebound

Quantumplation

DrunkenHyena

805

January 16, 2004 11:31 AM

Stated another way, the texture is still square (well, rectangular anyway) so it has coordinates going from 0.0 to 1.0 in the 4 corners. You have to decide how that square texture will be mapped to a non-square surface.

Stay Casual,

Ken
Drunken Hyena

Stay Casual,KenDrunken Hyena