… can’t find how to use textureCube … do i have to create an specific texture in my opengl application … or just using texture2d ??
thx
… can’t find how to use textureCube … do i have to create an specific texture in my opengl application … or just using texture2d ??
thx
OpenGL Specification V1.051, page 54:
vec4 textureCube (samplerCube sampler, vec3 coord [, float bias] )
vec4 textureCubeLod (samplerCube sampler, vec3 coord, float lod)
… this is what i found … and i’m trying it this way … but … surprisingly it don’t work … so i’m interested in how it works in detail … normally the access to a cube map is by using a 3d vector … depending on the main axis it’s possible to look up in a normal 2d texture … this is how i understood all the stuff … so what i’m doing in my implementation is loading a normal 2d image of an sliced cube … create a texture object … unit … all the normal gl stuff and set the uniform samplerCube … the question in detail is … to the texCube() gllang funktion really take the 3d vector calculate the coresponding 2d coordinates in an normal texture … or have i to use an cube texture in my opengl code … catchword: EXT_texture_cube_map …
Yes, you need to use a cubemap texture.
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