projection

The internal projection shader module shares view and projection matrices across GLSL shaders. It is not exported by @luma.gl/shadertools, and the package exposes no import subpath for it. This page describes the source implementation rather than a supported public API. Applications should use the projection contract supplied by their rendering pipeline; see Writing portable shaders.

Props

Property	Type	Initial value
viewMatrix	4×4 matrix	Identity
projectionMatrix	4×4 matrix	Identity
cameraPositionWorld	Three-component vector	[0, 0, 0]

Internal users pass both matrices together to recompute viewProjectionMatrix:

model.shaderInputs.setProps({projection: {viewMatrix, projectionMatrix, cameraPositionWorld}});

Vertex shader functions

• project_world_to_clipspace(vec3 position) applies the view-projection matrix.
• project_view_to_clipspace(vec3 position) applies the projection matrix.
• project_model_to_clipspace_Model(vec3 position, mat4 modelMatrix) applies model and view-projection transforms.
• project_to_clipspace(vec3 position) applies the view-projection matrix.
• project_setPosition(vec4 position) and project_setNormal(vec3 normal) publish world-space varyings.

Fragment shader functions

project_getPosition_World() and project_getNormal_World() read the varyings published by the vertex shader.

Compatibility

This module supplies GLSL source. For portable WGSL/GLSL projection, use the projection contract supplied by your rendering pipeline. See Writing portable shaders.