Horde3D

How to change the H3Dres for a model during the simulation?

Did you already read the wiki entry for how to modify vertex data?

Sorry, i'm still not clear about it.

In my crowd simulation, i prepared 64 materials of different colors, as shown in Fig.1. For each model, it has the independent "scene.xml" and "material.xml"(Fig.2).




Right now, i use the following codes to achieve the change of each crowd node:



where
vector<H3DRes> walk, walka;
cl is the latest index of the H3DRes.

Although it works(refer to Fig.3), it's time consuming. Is there a better method with high efficiency?



Thanks.

There are several ways to achieve what you want.

1) You can modify a uniform in material through h3dSetMaterialUniform. For example, you have a color uniform that you can change in application. But this way requires modification of shaders.
2) Change a material of a mesh.
h3dSetNodeParamI( meshID, H3DMatRes::MaterialElem, materialID );
You can also change a texture in a material, if needed:
h3dSetResParamI( materialID, H3DMatRes::SamplerElem, 0, H3DMatRes::SampTexResI, TextureID)