Method drawGrid

examples/OpenGLWindow/SimpleOpenGL2App.cpp:203–287

}

void SimpleOpenGL2App::drawGrid(DrawGridData data)
{
	glEnable(GL_COLOR_MATERIAL);
	int gridSize = data.gridSize;
	float upOffset = data.upOffset;
	int upAxis = data.upAxis;
	float gridColor[4];
	gridColor[0] = data.gridColor[0];
	gridColor[1] = data.gridColor[1];
	gridColor[2] = data.gridColor[2];
	gridColor[3] = data.gridColor[3];

	int sideAxis = -1;
	int forwardAxis = -1;

	switch (upAxis)
	{
		case 1:
			forwardAxis = 2;
			sideAxis = 0;
			break;
		case 2:
			forwardAxis = 1;
			sideAxis = 0;
			break;
		default:
			b3Assert(0);
	};
	//b3Vector3 gridColor = b3MakeVector3(0.5,0.5,0.5);

	b3AlignedObjectArray<unsigned int> indices;
	b3AlignedObjectArray<b3Vector3> vertices;
	int lineIndex = 0;
	for (int i = -gridSize; i <= gridSize; i++)
	{
		{
			b3Assert(glGetError() == GL_NO_ERROR);
			b3Vector3 from = b3MakeVector3(0, 0, 0);
			from[sideAxis] = float(i);
			from[upAxis] = upOffset;
			from[forwardAxis] = float(-gridSize);
			b3Vector3 to = b3MakeVector3(0, 0, 0);
			to[sideAxis] = float(i);
			to[upAxis] = upOffset;
			to[forwardAxis] = float(gridSize);
			vertices.push_back(from);
			indices.push_back(lineIndex++);
			vertices.push_back(to);
			indices.push_back(lineIndex++);
			//	m_renderer->drawLine(from,to,gridColor);
		}

		b3Assert(glGetError() == GL_NO_ERROR);
		{
			b3Assert(glGetError() == GL_NO_ERROR);
			b3Vector3 from = b3MakeVector3(0, 0, 0);
			from[sideAxis] = float(-gridSize);
			from[upAxis] = upOffset;