Join Pablo Colapinto for an in-depth discussion in this video Adding texture coordinates, part of Up and Running with OpenGL.
- Let's say we have an image that…we'd like to render on the screen.…Or some pattern that we've generated.…A texture coordinate is a way to refer…to a particular pixel of that image.…So zero zero would refer to the bottom left hand pixel…and one one would refer to the upper right hand pixel.…We can attach these coordinates to our vertices and the…GPU will help us interpolate all the values in between.…Let's take a look at how this works in practice.…Along with our position variable, we'd also…like a texture coordinate attribute to send along.…
Since this is a color, we're gonna pass this texture…coordinate along to the fragment shader.…We do that by setting a varying variable to…the incoming attribute texture coordinate…and referring to it here as well.…On line 49 of our fragment shader, we look up the value…of our texture using the texture coordinate.…Up here on line 44 is where we've defined our texture.…A texture's a type of sampler 2D…cause we're sampling a 2D image.…
Back on our CPU, we've defined a vertex that has a…
- What is OpenGL?
- Setting up an OpenGL workflow
- Creating a window with GLFW
- Working with geometric primitives
- Rotating, translating, and scaling
- Understanding matrix transformations
- Creating mesh data structures
- Buffering mesh data
- Getting mouse and keyboard input
Skill Level Intermediate
Q: Why am I getting errors saying I don’t have GLEW installed when I try to create the Xcode projects with Cmake?
1) Download, Install, and Run Xcode
ruby -e "$(curl -fsSL https://raw.github.com/Homebrew/homebrew/go/install)"
brew install glew
./bootstrap && make && make install
brew install cmake
cd Exercise Filesmkdir xcodecd xcodecmake -G "Xcode" ..