3D, Transforms, Textures
Practicing Transforms
Reading
Read Chapter 4.Class startup
git checkout master git pull git checkout working git merge masterImpatient? Git not being friendly today?
git fetch origin git checkout -b temp origin/masterYou will not be able to push from the temp branch. You must add a symlink before running today's code.
cd ~/cs40/code/w05-3D/sphere ln -s /usr/local/doc/textures/ dataSwitch to your working branch, open qtcreator, and set your executable to sphere in w05-3D/sphere.
Initial Explorations
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)