예제 #1
0
파일: Region.cpp 프로젝트: JoeGurt/PolyVox
	bool Region::containsPoint(const Vector3DFloat& pos, float boundary) const
	{
		return (pos.getX() <= m_v3dUpperCorner.getX() - boundary)
			&& (pos.getY() <= m_v3dUpperCorner.getY() - boundary)
			&& (pos.getZ() <= m_v3dUpperCorner.getZ() - boundary)
			&& (pos.getX() >= m_v3dLowerCorner.getX() + boundary)
			&& (pos.getY() >= m_v3dLowerCorner.getY() + boundary)
			&& (pos.getZ() >= m_v3dLowerCorner.getZ() + boundary);
	}
OpenGLSurfaceMesh BuildOpenGLSurfaceMesh(const SurfaceMesh<PositionMaterialNormal>& mesh)
{
	//Represents our filled in OpenGL vertex and index buffer objects.
	OpenGLSurfaceMesh result;

	//The source
	result.sourceMesh = &mesh;

	//Convienient access to the vertices and indices
	const vector<PositionMaterialNormal>& vecVertices = mesh.getVertices();
	const vector<uint32_t>& vecIndices = mesh.getIndices();

	//If we have any indices...
	if(!vecIndices.empty())
	{
		//Create an OpenGL index buffer
		glGenBuffers(1, &result.indexBuffer);
		glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, result.indexBuffer);

		//Get a pointer to the first index
		GLvoid* pIndices = (GLvoid*)(&(vecIndices[0]));		

		//Fill the OpenGL index buffer with our data. 
		glBufferData(GL_ELEMENT_ARRAY_BUFFER, vecIndices.size() * sizeof(uint32_t), pIndices, GL_STATIC_DRAW);
	}

	result.noOfIndices = vecIndices.size();

	glGenBuffers(1, &result.vertexBuffer);
	glBindBuffer(GL_ARRAY_BUFFER, result.vertexBuffer);
	glBufferData(GL_ARRAY_BUFFER, vecVertices.size() * sizeof(GLfloat) * 9, 0, GL_STATIC_DRAW);
	GLfloat* ptr = (GLfloat*)glMapBuffer(GL_ARRAY_BUFFER, GL_READ_WRITE);

	for(vector<PositionMaterialNormal>::const_iterator iterVertex = vecVertices.begin(); iterVertex != vecVertices.end(); ++iterVertex)
	{
		const PositionMaterialNormal& vertex = *iterVertex;
		const Vector3DFloat& v3dVertexPos = vertex.getPosition();
		//const Vector3DFloat v3dRegionOffset(uRegionX * g_uRegionSideLength, uRegionY * g_uRegionSideLength, uRegionZ * g_uRegionSideLength);
		const Vector3DFloat v3dFinalVertexPos = v3dVertexPos + static_cast<Vector3DFloat>(mesh.m_Region.getLowerCorner());

		*ptr = v3dFinalVertexPos.getX();
		ptr++;
		*ptr = v3dFinalVertexPos.getY();
		ptr++;
		*ptr = v3dFinalVertexPos.getZ();
		ptr++;

		*ptr = vertex.getNormal().getX();
		ptr++;
		*ptr = vertex.getNormal().getY();
		ptr++;
		*ptr = vertex.getNormal().getZ();
		ptr++;

		uint8_t material = vertex.getMaterial() + 0.5;

		OpenGLColour colour = convertMaterialIDToColour(material);

		*ptr = colour.red;
		ptr++;
		*ptr = colour.green;
		ptr++;
		*ptr = colour.blue;
		ptr++;
	}

	glUnmapBuffer(GL_ARRAY_BUFFER);

	return result;
}