void Scene::optixInit(optix::Context context) {
// Group containing each object transform
Optix.group = context->createGroup();
Optix.group->setAcceleration(context->createAcceleration(OPTIX_SCENE_BUILDER, OPTIX_SCENE_TRAVERSER)); // TODO: Look into different traversers/builders
for (uint i = 0; i < objects.size(); i++) {
objects[i]->optixInit(context);
Optix.group->addChild(objects[i]->Optix.transform);
}
// Sky texture sampler
#if OPTIX_USE_OPENGL_TEXTURE
Optix.sky = context->createTextureSamplerFromGLImage(sky->texture, RT_TARGET_GL_TEXTURE_2D);
#else
optix::Buffer buf = context->createBuffer(RT_BUFFER_INPUT, RT_FORMAT_FLOAT4, sky->width, sky->height);
memcpy(buf->map(), sky->pixels, sky->width * sky->height * sizeof(Color));
buf->unmap();
Optix.sky = context->createTextureSampler();
Optix.sky->setArraySize(1);
Optix.sky->setMipLevelCount(1);
Optix.sky->setBuffer(0, 0, buf);
#endif
Optix.sky->setWrapMode(0, RT_WRAP_REPEAT);
Optix.sky->setWrapMode(1, RT_WRAP_REPEAT);
Optix.sky->setIndexingMode(RT_TEXTURE_INDEX_NORMALIZED_COORDINATES);
Optix.sky->setReadMode(RT_TEXTURE_READ_NORMALIZED_FLOAT);
Optix.sky->setMaxAnisotropy(1.f);
Optix.sky->setFilteringModes(RT_FILTER_LINEAR, RT_FILTER_LINEAR, RT_FILTER_NONE);
}
optix::TextureSampler Texture::createTextureSamplerFromBuffer( optix::Context & context, optix::Buffer buffer )
{
optix::TextureSampler sampler = context->createTextureSampler();
sampler->setWrapMode(0, RT_WRAP_REPEAT);
sampler->setWrapMode(1, RT_WRAP_REPEAT);
sampler->setFilteringModes(RT_FILTER_LINEAR, RT_FILTER_LINEAR, RT_FILTER_NONE);
sampler->setIndexingMode(RT_TEXTURE_INDEX_NORMALIZED_COORDINATES);
sampler->setMaxAnisotropy(4.f);
sampler->setArraySize(1);
sampler->setReadMode(RT_TEXTURE_READ_NORMALIZED_FLOAT);
sampler->setMipLevelCount(1);
sampler->setBuffer(0, 0, buffer);
return sampler;
}
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);
}
}