Texture management

#1 none of the PNG files are mipmap'ed. BM8 (8-bit bitmap with alpha channel) all contain mipmap information.

#2 The terrain engine blends it's textures on the fly and dynamically creates mipped versions.

#3 Harold, normally textures themselves never contains mipmap information. They are generated when creating an OpenGL texture.

Tim, does this mean that the mipmapping for terrain textures is different then other textures ? I'm asking this because I'm implementing S3TC texturecompression and I'm using the .dds format (DirectDraw surface). But they allready contains all the mip levels.

Where are terrain textures loaded ? When setting a breakpoint on loadTexture in Texturemanager, the filename of the terrain textures are never showing up. Are they included in the terrain file ?

Jan

#4 Mip-mapping is different for the terrain textures. In terrain/terrData.cc, search for loadBitmapInstance, and the word Blender.

#5 The BM8 files contain all of the MipMap images.

so if your image is 256x256 the bm8 file will contain the full size 256x256, a 128x128, a 64x64, a 32x32, a 16x16, a 8x8, a 4x4, a 2x2, and a 1x1 representation of that image. Be it a texture, a model skin, whatever. As to if .png only are used for the terrain texture I'll have to get back to you on that.

#6 Tim, Harold thanks for the help

Jan