Hello,
I see no mention of TextureCoordinates, do you supply them with your
geometry ?
Regards
Matthias
On Monday 12 March 2007 15:40, Martin Pfeiffer wrote:
> Hello,
> perhaps anyone can help me with the texturizing of my point sprites.
> - what is wrong?
>
> To have a single textured Point Sprite i tried this here:
>
> 1. i defined a TextureChunkPtr, loaded a texture, set it per
> ...->setPointSprite(bool b) true
> 2. i defined a BlendChunkPtr, gave properties
> 3. i defined a PointChunkPtr, set it per ...->setSprite(bool b) true
> 4. i created a ChunkMaterialPtr, to bundle the properties
> 5. i defined a GeometryPtr with: GeoPTypesPtr(GL_POINT),
> GeoPLengthsPtr(1), GeoPositions3fPtr(x,y,z)
> 6. i created a NodePtr, set the core with the given geometry
>
> In the result i have a black square with no texture.
> - why is that so? have i forgotten something?
> - is it at all possible to texturize point sprites?
>
>
> would be nice, if anybody helped - thanx - MartiN
>
>
>
>
>
>
>
>
>
> Here is the code:
>
> /*###########################################################*/
>
> ImagePtr image = Image::create(); // material
> image->read("textures/dummy_tex.tga");
> TextureChunkPtr texChunk = TextureChunk::create();
> beginEditCP(texChunk);
> {
> texChunk->setEnvMode(GL_MODULATE);
> texChunk->setMinFilter(GL_LINEAR_MIPMAP_LINEAR);
> texChunk->setMagFilter(GL_LINEAR);
> texChunk->setScale(true);
> texChunk->setImage(image);
> texChunk->setPointSprite(true);
> }
> endEditCP(texChunk);
>
> BlendChunkPtr blendChunk = BlendChunk::create();
> beginEditCP(blendChunk);
> {
> blendChunk->setAlphaValue(0.2f);
> blendChunk->setAlphaFunc (GL_GEQUAL);
> blendChunk->setSrcFactor (GL_SRC_ALPHA);
> blendChunk->setDestFactor(GL_ONE_MINUS_SRC_ALPHA);
> }
> endEditCP(blendChunk);
>
> PointChunkPtr pointChunk = PointChunk::create();
> beginEditCP(pointChunk);
> pointChunk->setSprite(true);
> pointChunk->setSize(100);
> endEditCP(pointChunk);
>
> ChunkMaterialPtr material = ChunkMaterial::create();
> beginEditCP(material);
> material->addChunk(pointChunk);
> material->addChunk(texChunk);
> material->addChunk(blendChunk);
> endEditCP(material);
>
> GeoPTypesPtr type = GeoPTypesUI8::create(); // geo
> GeoPLengthsPtr length = GeoPLengthsUI32::create();
> GeoPositions3fPtr pos_sprite = GeoPositions3f::create();
>
> beginEditCP(pos_sprite);
> pos_sprite->addValue(Pnt3f( 1000 , 1000 ,1000 ));
> endEditCP(pos_sprite);
>
> beginEditCP(type);
> type->addValue(GL_POINT);
> endEditCP(type);
>
> beginEditCP(length);
> length->addValue(pos_sprite->getSize());
> endEditCP(length);
>
> GeometryPtr spriteGeo = Geometry::create();
> beginEditCP(spriteGeo);
> {
> spriteGeo->setTypes(type);
> spriteGeo->setLengths(length);
> spriteGeo->setPositions(pos_sprite);
> spriteGeo->setMaterial(material);
> }
> endEditCP(spriteGeo);
>
> // ... add node to the scene
>
> /*###########################################################*/
--
+---------------------+----------------------------+
| VREC GmbH | |
| Matthias Stiller | |
| Robert-Bosch-Str. 7 | tel: +49 6151 4921034 |
| 64293 Darmstadt | web: http://www.vrec.de |
| Germany | mail: [EMAIL PROTECTED] |
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