Custom material on a Rectangle Entity

hannah · December 2, 2015, 3:04pm

You would have to create a custom MaterialProperty. Entities use properties to create a higher level interface that handles changes automatically so the user doesn’t have to delete and re-add geometry when things change.

I’m not incredibly familiar with this code, but this function is responsible for creating a Material from the MaterialProperty:

github.com

CesiumGS/cesium/blob/master/Source/DataSources/MaterialProperty.js#L93


*/
MaterialProperty.getValue = function (time, materialProperty, material) {
 var type;


 if (defined(materialProperty)) {
   type = materialProperty.getType(time);
   if (defined(type)) {
     if (!defined(material) || material.type !== type) {
       material = Material.fromType(type);
     }
     materialProperty.getValue(time, material.uniforms);
     return material;
   }
 }


 if (!defined(material) || material.type !== Material.ColorType) {
   material = Material.fromType(Material.ColorType);
 }
 Color.clone(Color.WHITE, material.uniforms.color);


 return material;

To create a custom material for your new MaterialProperty to use, I think you just have to write a shader.

I think the function Material.fromType(‘myType’, uniforms) creates a material that uses myTypeMaterial.glsl.

Hopefully someone else can elaborate on this if I’m missing something or got something wrong. haha.

Best,

Hannah