hi i start write some documentation here for custom material ( its realy easy for me to make it here but i can move it in documentation after that complete )
definition : Custom Material inherited from stable version of Standard material (a carbon Copy of BABYLON.StandarMaterial)
when we need CustomMaterial ? : any time you wanna make any custom option but you can’t manage that in standard material .
vertex shader definitions :
- position(readonly) or positionUpdated(vec3) : local position per vertex
- normal(readonly) or NormalUpdated(vec3) : local normal
fragment shader definitions :
- vPositionW( readonly) : world position per pixel
- vNormalW(read only)
- vDiffuseUV(vec2) : (readonly) : defined uv attribute append when you have DiffuseTexture
- diffuseColor(vec3) you can manage that with Fragment_Custom_Diffuse : for control Diffuse color **** that mixed with diffuseTexture if you add any texture
- alpha(float) you can manage that from Fragment_Custom_alpha : for control transparency
- color(vec4) last result after attached all effect (light fog shadow … ) you can manage that in Fragment_before_FragColor
methods :
Start
.material = new BABYLON.CustomMaterial(“name”,scene);
Demo : You can define customMaterial exactly like StandardMaterial and you have all property and methods in custom material too
AddUniform
material.AddUniform(‘test1’,‘vec3’);
- simple (float,vec2, vec3,vec4,…) demo
- sampler without UV with Define UV
- array array3 , float
Fragment_Begin
material.Fragment_Begin( string)
#include<__decl__defaultFragment>
[Fragment_Begin]
#extension GL_OES_standard_derivatives : enable
for define any new extension or include any shader (not find any requirement for make sample)
Fragment_Definitions
material.Fragment_Definitions( string)
#[Fragment_Definitions]
void main(void) {
this define before main you can define any varying or global function before main
demo : make varying for simple noise used vertex data to add normal
demo : change vertex use definition function
Fragment_MainBegin
void main(void) {
vNormalW = vNormalW_helper;
#[Fragment_MainBegin]
demo : correct normal for back face
Fragment_Custom_Diffuse
you most find your result red and green and blue (witch any way you like ) and set it in diffuseColor or result
*** result (vec3) in this method replaced (one time) by diffuseColor
set texture setTexture use diffuseColor
Fragment_Custom_Alpha
you most find your alpha and set it to alpha variable or in result
*** result (vec3) in this method replaced (one time) byalpha
Fragment_Before_FragColor
before the last result you have chance to manage your result your final color available in color variable and you most be set it color after your changes
*** result (vec4) in this method replaced (one time) by color
demo result with and without light effect
Vertex_Begin
for define any new extension or include any shader (not find any requirement for make sample)
Vertex_Definitions
this define before main you can define any varying or global function before main
Vertex_MainBegin
same as Fragment_Main
Vertex_Before_PositionUpdated
localPosition = positionUpdated;
#[Vertex_Before_PositionUpdated]
gl_Position=viewProjection*finalWorld*vec4(positionUpdated,1.0);
you most change positionUpdated in here for change last vertex result
Vertex_Before_NormalUpdated
#ifdef NORMAL
#[Vertex_Before_NormalUpdated]
localNormal = normalUpdated;
vNormalW_helper=normalize(vec3(finalWorld*vec4(normalUpdated,0.0)));
you most change normalUpdated in here for change last vertex normal result
related samples
Update Uniform demo
