Join Pablo Colapinto for an in-depth discussion in this video Working with the Model matrix, part of Up and Running with OpenGL.
Let's take a look at how to generate…these matrices in practice,…using the GLM library.…Our shader code now has three not four uniforms,…four by four matrices,…a model, a view, and a projection.…Notice that when we calculate…the final GL position for our vertex,…we apply the model matrix,…then the view matrix,…then the projection matrix,…to our position.…We are going to use GLMs built in VEC2 and VEC4s,…just for consistency.…
And here, when we define our…triangle vertex positions and color values,…we're also using GLMs built in VEC2 and VEC4 structs.…On line 85, we have three new members.…A model ID, a view ID, and a projection ID.…On line 101, we create, compile, and link our shader…and on lines 104 to 110 we get the attributes…and uniform locations of that shader,…binding them to our member valuables.…Lines 115 through 142 are the same as before,…with the exception that…since we're using GLMs built in VEC2,…that's the offset parameter we need to set…to GL vertex attribute pointer.…
So let's look at our on draw loop.…
- 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" ..