World to Object matrix in custom shaders

PC_Coder · April 7, 2021, 2:53pm

In custom shaders we use uniform mat4 matrix_model; for model matrix (or Object to World matrix).

What variable is for world matrix (World to Object matrix)? matrix_world or matrix_object isn’t working

FBplus · April 7, 2021, 4:11pm

Maybe you could try using the inverse function to create the matrix?

mat4 matrix = inverse(matrix_model);

I don’t know if there is any build in matrix.

mvaligursky · April 7, 2021, 4:30pm

I don’t think there is one, here’s what engine sets up

github.com

playcanvas/engine/blob/617f9228eeb98c14f807e25d8c458eb293e0734a/src/scene/forward-renderer.js#L430-L465


this.projId = scope.resolve('matrix_projection');
this.projSkyboxId = scope.resolve('matrix_projectionSkybox');
this.viewId = scope.resolve('matrix_view');
this.viewId3 = scope.resolve('matrix_view3');
this.viewInvId = scope.resolve('matrix_viewInverse');
this.viewProjId = scope.resolve('matrix_viewProjection');
this.viewPos = new Float32Array(3);
this.viewPosId = scope.resolve('view_position');
this.nearClipId = scope.resolve('camera_near');
this.farClipId = scope.resolve('camera_far');
this.cameraParamsId = scope.resolve('camera_params');
this.shadowMapLightRadiusId = scope.resolve('light_radius');
this.fogColorId = scope.resolve('fog_color');
this.fogStartId = scope.resolve('fog_start');
this.fogEndId = scope.resolve('fog_end');
this.fogDensityId = scope.resolve('fog_density');
this.modelMatrixId = scope.resolve('matrix_model');
this.normalMatrixId = scope.resolve('matrix_normal');

This file has been truncated. show original