Пример #1
0
optix::GeometryInstance CornellSmall::createParallelogram(
    unsigned int meshId,
    optix::Context & context,
    const optix::float3& anchor,
    const optix::float3& offset1,
    const optix::float3& offset2,
    Material & material)
{
    optix::Geometry parallelogram = context->createGeometry();
    parallelogram->setPrimitiveCount( 1u );
    parallelogram->setIntersectionProgram( m_pgram_intersection );
    parallelogram->setBoundingBoxProgram( m_pgram_bounding_box );

    optix::float3 normal = optix::normalize( optix::cross( offset1, offset2 ) );
    float d = optix::dot( normal, anchor );
    optix::float4 plane = optix::make_float4( normal, d );

    optix::float3 v1 = offset1 / optix::dot( offset1, offset1 );
    optix::float3 v2 = offset2 / optix::dot( offset2, offset2 );

    parallelogram["meshId"]->setUint(meshId);
    parallelogram["plane"]->setFloat( plane );
    parallelogram["anchor"]->setFloat( anchor );
    parallelogram["v1"]->setFloat( v1 );
    parallelogram["v2"]->setFloat( v2 );

    optix::Material matl = material.getOptixMaterial(context);

    optix::GeometryInstance gi = context->createGeometryInstance( parallelogram, &matl, &matl+1 );
    material.registerGeometryInstanceValues(gi);
    return gi;
}
Пример #2
0
void OptiXRenderer::convertToOptiXScene(optix::Context context, int width, int height, float film_location) {
	// Setup lighting
	// TODO For now, we assume just one light
	context->setEntryPointCount( 1 );
	context->setRayGenerationProgram( 0, mScene->mLights[0]->getOptiXLight(context) );

	// Exception program
	context->setExceptionProgram( 0, context->createProgramFromPTXFile( "ptx/PhotonTracer.ptx", "exception" ) );

	// Miss program
	context->setMissProgram( 0, context->createProgramFromPTXFile( "ptx/PhotonTracer.ptx", "miss" ) );

	// Geometry group
	optix::GeometryGroup geometrygroup = context->createGeometryGroup();
	geometrygroup->setChildCount( mScene->mObjects.size() + 1 );
	geometrygroup->setAcceleration( context->createAcceleration("Bvh","Bvh") );

	// Add objects
	for(std::vector<RenderObject*>::size_type i = 0; i != mScene->mObjects.size(); i++) {
		optix::GeometryInstance gi = context->createGeometryInstance();
		// TODO we only support 1 material type per object
		gi->setMaterialCount(1);
		gi->setGeometry(   mScene->mObjects[i]->getOptiXGeometry(context));
		gi->setMaterial(0, mScene->mObjects[i]->getOptiXMaterial(context));
		geometrygroup->setChild(i, gi);
	}

	// Create Camera
	//
	mCameraMat = new CameraMaterial(width, height, 1);
	PlaneObject* plane = new PlaneObject(mCameraMat);
	plane->setPosition(0, 0, film_location); //-65
	mCameraObject = plane;
	// Convert to OptiX
	optix::GeometryInstance gi = context->createGeometryInstance();
	gi->setMaterialCount(1);
	gi->setGeometry(   mCameraObject->getOptiXGeometry(context));
	mCameraMatOptiX = mCameraObject->getOptiXMaterial(context);
	mCameraMatOptiX["width"]->setInt(width);
	mCameraMatOptiX["height"]->setInt(height);
	gi->setMaterial(0, mCameraMatOptiX);
	geometrygroup->setChild(mScene->mObjects.size(), gi);

	context["top_object"]->set(geometrygroup);
}
Пример #3
0
void TriangleMesh::optixInit(optix::Context context) {

	try {

		static optix::Program intersectProgram = context->createProgramFromPTXFile("ptx/triangle_mesh_program.cu.ptx", "intersect");
		static optix::Program boundsProgram = context->createProgramFromPTXFile("ptx/triangle_mesh_program.cu.ptx", "bounds");

#if OPTIX_USE_GEOMETRY_VBO
		// Bind vertex VBO
		Optix.posBuffer = context->createBufferFromGLBO(RT_BUFFER_INPUT, vboPos);
		Optix.posBuffer->setFormat(RT_FORMAT_FLOAT3);
		Optix.posBuffer->setSize(posData.size());

		// Bind normal VBO
		Optix.normalBuffer = context->createBufferFromGLBO(RT_BUFFER_INPUT, vboNormal);
		Optix.normalBuffer->setFormat(RT_FORMAT_FLOAT3);
		Optix.normalBuffer->setSize(normalData.size());

		// Bind texture VBO
		Optix.texCoordBuffer = context->createBufferFromGLBO(RT_BUFFER_INPUT, vboTexCoord);
		Optix.texCoordBuffer->setFormat(RT_FORMAT_FLOAT2);
		Optix.texCoordBuffer->setSize(texCoordData.size());

		// Bind index IBO
		Optix.indexBuffer = context->createBufferFromGLBO(RT_BUFFER_INPUT, ibo);
		Optix.indexBuffer->setFormat(RT_FORMAT_UNSIGNED_INT);
		Optix.indexBuffer->setSize(indexData.size());
#else
		// Copy position buffer
		Optix.posBuffer = context->createBuffer(RT_BUFFER_INPUT, RT_FORMAT_FLOAT3, posData.size());
		memcpy(Optix.posBuffer->map(), &posData[0], posData.size() * sizeof(Vec3));
		Optix.posBuffer->unmap();

		// Copy normal buffer
		Optix.normalBuffer = context->createBuffer(RT_BUFFER_INPUT, RT_FORMAT_FLOAT3, normalData.size());
		memcpy(Optix.normalBuffer->map(), &normalData[0], normalData.size() * sizeof(Vec3));
		Optix.normalBuffer->unmap();

		// Copy texture buffer
		Optix.texCoordBuffer = context->createBuffer(RT_BUFFER_INPUT, RT_FORMAT_FLOAT2, texCoordData.size());
		memcpy(Optix.texCoordBuffer->map(), &texCoordData[0], texCoordData.size() * sizeof(Vec2));
		Optix.texCoordBuffer->unmap();

		// Copy index buffer
		Optix.indexBuffer = context->createBuffer(RT_BUFFER_INPUT, RT_FORMAT_UNSIGNED_INT3, indexData.size());
		memcpy(Optix.indexBuffer->map(), &indexData[0], indexData.size() * sizeof(TrianglePrimitive));
		Optix.indexBuffer->unmap();
#endif

		// Make geometry
		Optix.geometry = context->createGeometry();
		Optix.geometry->setIntersectionProgram(intersectProgram);
		Optix.geometry->setBoundingBoxProgram(boundsProgram);
		Optix.geometry->setPrimitiveCount(indexData.size());
		Optix.geometry["posData"]->setBuffer(Optix.posBuffer);
		Optix.geometry["normalData"]->setBuffer(Optix.normalBuffer);
		Optix.geometry["texCoordData"]->setBuffer(Optix.texCoordBuffer);
		Optix.geometry["indexData"]->setBuffer(Optix.indexBuffer);

		// Make instance
		if (!material->Optix.material) {
			
#if OPTIX_USE_OPENGL_TEXTURE
			material->Optix.sampler = context->createTextureSamplerFromGLImage(material->image->texture, RT_TARGET_GL_TEXTURE_2D);
#else
			optix::Buffer buf = context->createBuffer(RT_BUFFER_INPUT, RT_FORMAT_FLOAT4, material->image->width, material->image->height);
			memcpy(buf->map(), material->image->pixels, material->image->width * material->image->height * sizeof(Color));
			buf->unmap();
			material->Optix.sampler = context->createTextureSampler();
			material->Optix.sampler->setArraySize(1);
			material->Optix.sampler->setMipLevelCount(1);
			material->Optix.sampler->setBuffer(0, 0, buf);
#endif
			material->Optix.sampler->setWrapMode(0, RT_WRAP_REPEAT);
			material->Optix.sampler->setWrapMode(1, RT_WRAP_REPEAT);
			material->Optix.sampler->setIndexingMode(RT_TEXTURE_INDEX_NORMALIZED_COORDINATES);
			material->Optix.sampler->setReadMode(RT_TEXTURE_READ_NORMALIZED_FLOAT);
			material->Optix.sampler->setMaxAnisotropy(1.f);
			RTfiltermode filter = (material->image->filter == GL_NEAREST) ? RT_FILTER_NEAREST : RT_FILTER_LINEAR;
			material->Optix.sampler->setFilteringModes(filter, filter, RT_FILTER_NONE);
			
			material->Optix.material = context->createMaterial();
			material->Optix.material->setClosestHitProgram(0, materialClosestHitProgram);
			material->Optix.material->setAnyHitProgram(1, materialAnyHitProgram);
			material->Optix.material["sampler"]->setTextureSampler(material->Optix.sampler);
			material->Optix.material["ambient"]->setFloat(material->ambient.r(), material->ambient.g(), material->ambient.b(), material->ambient.a());
			material->Optix.material["specular"]->setFloat(material->specular.r(), material->specular.g(), material->specular.b(), material->specular.a());
			material->Optix.material["diffuse"]->setFloat(material->diffuse.r(), material->diffuse.g(), material->diffuse.b(), material->diffuse.a());
			material->Optix.material["shineExponent"]->setFloat(material->shineExponent);
			material->Optix.material["reflectIntensity"]->setFloat(material->reflectIntensity);
			material->Optix.material["refractIndex"]->setFloat(material->refractIndex);

		}

		Optix.geometryInstance = context->createGeometryInstance();
		Optix.geometryInstance->setGeometry(Optix.geometry);
		Optix.geometryInstance->addMaterial(material->Optix.material);

	} catch (optix::Exception e) {
		printException(e);
	}

}