PIXI.UniformGroup

UniformGroup has two modes:

1: Normal mode Normal mode will upload the uniforms with individual function calls as required

2: Uniform buffer mode This mode will treat the uniforms as a uniform buffer. You can pass in either a buffer that you manually handle, or or a generic object that PixiJS will automatically map to a buffer for you. For maximum benefits, make Ubo UniformGroups static, and only update them each frame.

Rules of UBOs:

• UBOs only work with WebGL2, so make sure you have a fallback!
• Only floats are supported (including vec[2,3,4], mat[2,3,4])
• Samplers cannot be used in ubo's (a GPU limitation)
• You must ensure that the object you pass in exactly matches in the shader ubo structure. Otherwise, weirdness will ensue!
• The name of the ubo object added to the group must match exactly the name of the ubo in the shader.

// ubo in shader:
uniform myCoolData { // declaring a ubo..
mat4 uCoolMatrix;
float uFloatyMcFloatFace


// a new uniform buffer object..
const myCoolData = new UniformBufferGroup({
  uCoolMatrix: new Matrix(),
  uFloatyMcFloatFace: 23,
}}

// build a shader...
const shader = Shader.from(srcVert, srcFrag, {
  myCoolData // name matches the ubo name in the shader. will be processed accordingly.
})