salpieiev/learngl2

learngl2's Issues

Projective texturing texture coordinates

At its most basic, projective texturing is the use of a 3D texture coordinate to look up into a 2D texture image. The (s, t) coordinates are divided by the (r) coordinate such that a texel is fetched using (s/r, t/r). There is a special built-in function in the OpenGL ES Shading Language to do projective texturing called texture2DProj.

Quaternion multiplication

QuaternionT Rotated(const QuaternionT& b) const;
How this method works? Is it related to quaternion multipication?

Correct normal matrix is inverse-transpose of the modelview matrix

How to calculate inverse matrix?
Full description - iPhone 3D programming (page 131)

Learn 'texturetool' command

What is 'pngcrush' command?

Create snapshot

Why glReadPixel doesn't work?

Compute the matrix that transforms the unflexed bone to its current state

iPhone 3D, page 380

Learn LookAt function

iPhone 3D Programming book. Page 58

NPOT textures

Loading objects from 3D editor

Bloom effect

iPhone 3D, page 354

Cube map, sphere map

Blending

Page 221, iPhone 3D

glCopyTexImage2D

Scissor

Learn mipmaps

Generate mipmaps using:

• OpenGL
• Third party tools
• Own tool

Stencil

Derivation of vector's cross product formula

Generating noise

Drawing to offscreen framebuffer

Skybox

Text drawing

Shadows

Vertex skinning

OpenGL ES 2.0 Programming Guide, page 168

Learn PVR Textures

Blending

How to draw semitransparent 3D object?

Texture atlases

Texture coordinates calculation

iPhone 3D Programming, page 171

Projective texturing

Dithering

Normals calculation

Teach Cross() product of two vectors.
Resulting vector direction.

Learn GenerateLineIndices method

Texturing

glActiveTexture
Multitexturing
Normal mapping
Fog
Alpha test
User clip planes

glFramebufferTexture2D

3D Textures