Horde3D
http://horde3d.org/forums/

Procedural geometry normals
http://horde3d.org/forums/viewtopic.php?f=2&t=1491		 Page 1 of 1
Author:  polygoff [ 08.04.2011, 10:59 ]
Post subject:  Procedural geometry normals
I'm trying to use this codesniplet here

The generated geometry looks fine at first, but when I apply a material with normalmapping (for example the rock texture from the samples), the quad just becomes a single brown solid. I tried changing the normalData around, but the problem persists. How can I analyze this error further?
Author:  worstplayer [ 08.04.2011, 12:51 ]
Post subject:  Re: Procedural geometry normals
Looks like the geometry is missing tangent data, maybe that's the problem?
Author:  polygoff [ 08.04.2011, 20:46 ]
Post subject:  Re: Procedural geometry normals
Trying to add that does not seem to help. I might be doing it wrong though. Here is a full snippet which should be copy&pasteable into any Horde3D setup (but don't work):
Code:
void StateGame::createSimpleGeometryRes() {
    // Cache the resources
    H3DRes matRes = h3dAddResource(H3DResTypes::Material, "models/stone/stone.material.xml", 0);
    h3dutLoadResourcesFromDisk( _params->ContentDirectory.c_str() );

    // Create the needed data for a simple quad that is textured on both sides
    float posData[] = {
        0,  0, 0,
        100, 0, 0,
        0, 100, 0,
        100, 100, 0
    };
    unsigned int vertexCount = 4;

    unsigned int indexData[] = { 0,1,2, 2,1,3,  3,1,2, 2,1,0 };
    unsigned int triangleIndexCount = 12;
    unsigned int triangleIndexMax = 3;
   
    short normalData[] = {
        0, 0, 1,
        0, 0, 1,
        0, 0, 1,
        0, 0, 1
    };
    short tangentData[] = {
        0, 1, 0,
        0, 1, 0,
        0, 1, 0,
        0, 1, 0
    };
    short bitangentData[] = {
        1, 0, 0,
        1, 0, 0,
        1, 0, 0,
        1, 0, 0
    };
    float uvData[] = {
        0, 0,
        1, 0,
        0, 1,
        1, 1
    };
   
    H3DRes geoRes = h3dutCreateGeometryRes("geoRes", vertexCount, triangleIndexCount, posData, indexData, normalData, tangentData, bitangentData, uvData, 0);
    H3DNode model = h3dAddModelNode( H3DRootNode, "DynGeoModelNode", geoRes );
    h3dAddMeshNode( model, "DynGeoMesh", matRes, 0, triangleIndexCount, 0, triangleIndexMax );
    //h3dSetNodeTransform( model, 0,0,0, 0,40,0, 1,1,1 );
}
Author:  worstplayer [ 15.04.2011, 12:50 ]
Post subject:  Re: Procedural geometry normals
Did some more experimenting. Yeah, setting tangent data in CreateGeometryRes doesn't work for me either. But it works from MapResStream. Strange.
Author:  AlexL [ 15.04.2011, 17:18 ]
Post subject:  Re: Procedural geometry normals
Change line 680 in Horde3DUtils/main.cpp from
Code:
// Set number of streams
*( (uint32 *)pData ) = 1 + numTexSets + ( normalData ? 1 : 0 ); pData += sizeof( uint32 );
to
Code:
// Set number of streams
*( (uint32 *)pData ) = 1 + numTexSets + ( normalData ? 1 : 0 ) + ((tangentData && bitangentData) ? 2 : 0); pData += sizeof( uint32 );
Page 1 of 1 All times are UTC + 1 hour
Powered by phpBB® Forum Software © phpBB Group
https://www.phpbb.com/