natiny.material.set_vertex_constant
natiny.material.set_vertex_constant(material, name, constant_type)
Declares that the engine owns a constant: before every draw it is refilled with an engine-provided value instead of keeping whatever you set.
Members named mtx_world, mtx_view, mtx_proj, mtx_worldview, mtx_viewproj, mtx_worldviewproj and mtx_normal are declared this way for you. Use this call when your shader names them differently, or to turn one back into a plain user constant.
Parameters
| Name | Type | Description |
|---|---|---|
material |
number |
Material handle |
name |
string |
Member name inside one of the shader's uniform blocks |
constant_type |
number |
One of the constants below |
Constant types
| Constant | Meaning |
|---|---|
natiny.material.USER |
whatever you set |
natiny.material.WORLD |
the drawn object's world transform |
natiny.material.VIEW |
camera view |
natiny.material.PROJECTION |
projection |
natiny.material.WORLDVIEW |
view × world |
natiny.material.VIEWPROJ |
projection × view |
natiny.material.WORLDVIEWPROJ |
projection × view × world |
natiny.material.NORMAL |
inverse transpose of worldview |
natiny.material.INV_VIEW |
inverse of the camera view |
natiny.material.INV_PROJECTION |
inverse projection |
natiny.material.INV_VIEWPROJ |
inverse of projection × view |
natiny.material.CAMERA_POS |
vec4: the eye in world space |
natiny.material.TARGET_SIZE |
vec4: width, height, 1/width, 1/height |
Example
natiny.material.set_vertex_constant(material, "u_mvp", natiny.material.WORLDVIEWPROJ)