3D, Transforms, Textures
Practicing Transforms
Reading
Read Chapter 4.Class startup
[~]$ cd cs40/examples [examples]$ cp -r ~adanner/public/cs40/examples/w04-3D ./ [examples]$ git add w04-3D [examples]$ git commit -m "w04 start"Switch to your working branch, open qtcreator, and set your executable to sphere in w04-3D/cube.
Initial Explorations
vColor as attribute GL_DEPTH_TEST, GL_DEPTH_BUFFER_BIT
shaders and rotation matrices
When you first run your program, you should get a wireframe outline of a square. You can rotate using the x,y, and z keys.
- Why is the square not square?
Examine the method updatePolyMode and see where it is called. Find out how to change the mode and toggle the various features.
Find out how to toggle the sphere
Examine GL_CULL_FACE
- What is it?
- What does it do?
- Why would we use it?
- Why would we not use it?
Texture Mapping
go to the fragment shader and uncomment the first fragColor line, while commenting out the third line. recompile and run. Woot!
- texCoords
- sampler2D
- bindTexture
- glBindTexture
- glEnable(GL_TEXTURE_2D)
- setUniform"Tex0",0)