Join Pablo Colapinto for an in-depth discussion in this video Applying orthographic projection, part of Up and Running with OpenGL.
-Let's take a look at how we can use these…matrix transformations in practice…in our programmable pipeline.…At the top of our file, we're including our…new GL macros and GL shaders hpp files.…We're also including some new headers…from the GLM matrix library, very popular…with modern open GL programmers.…In our shader code, we've added a new uniform…called ortho.…It's a mat four, that means it's a four-by-four matrix,…and it's uniform because we're going to apply…the same matrix to all the vertices that pass…through the shader.…
The rest of the shader code is the same,…except for GL position, where we multiply the ortho…matrix by the position.…After we create our shader program, we get both…the position and color attributes from it,…and we also get an ortho ID, which gets the uniform…location of the ortho four-by-four matrix…that we specified in the vertex shader.…We generate and bind our vertex arrays as before,…generate, and bind, and send our buffer data,…enable our vertex attributor arrays,…and on on draw, after we bind our shader,…
- 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" ..