Method Draw

demo/d3d11/diffuseRender.cpp:124–217

void DiffuseRenderer::Draw(const DiffuseDrawParams* params, ID3D11Buffer* positions, ID3D11Buffer* velocities, ID3D11Buffer* indices, int numParticles)
{
	using namespace DirectX;

	ID3D11DeviceContext* deviceContext = m_deviceContext;

	// update constant buffer
	{
		D3D11_MAPPED_SUBRESOURCE mappedResource = { 0 };
		if (S_OK == deviceContext->Map(m_constantBuffer, 0u, D3D11_MAP_WRITE_DISCARD, 0, &mappedResource))
		{
			DiffuseShaderConst cParams;

			cParams.modelViewProjection = (float4x4&)(XMMatrixMultiply(XMMatrixMultiply(params->model, params->view), params->projection));
			cParams.modelView = (float4x4&)XMMatrixMultiply(params->model, params->view);
			cParams.projection = (float4x4&)params->projection;			
			
			cParams.motionBlurScale = params->motionScale;
			cParams.diffuseRadius = params->diffuseRadius;
			cParams.diffuseScale = params->diffuseScale;
			cParams.spotMin = params->spotMin;
			cParams.spotMax = params->spotMax;

			cParams.lightTransform = (float4x4&)params->lightTransform;
			cParams.lightPos = params->lightPos;
			cParams.lightDir = params->lightDir;
			cParams.color = params->color;
			

			memcpy(cParams.shadowTaps, params->shadowTaps, sizeof(cParams.shadowTaps));

			memcpy(mappedResource.pData, &cParams, sizeof(DiffuseShaderConst));

			deviceContext->Unmap(m_constantBuffer, 0u);
		}
	}

	deviceContext->VSSetShader(m_diffuseVS, nullptr, 0u);
	deviceContext->GSSetShader(m_diffuseGS, nullptr, 0u);
	deviceContext->PSSetShader(m_diffusePS, nullptr, 0u);

	if (params->shadowMap)
	{
		ShadowMap* shadowMap = (ShadowMap*)params->shadowMap;
		
		ID3D11ShaderResourceView* ppSRV[1] = { shadowMap->m_depthSrv.Get() };
		deviceContext->PSSetShaderResources(0, 1, ppSRV);
		ID3D11SamplerState* ppSS[1] = { shadowMap->m_linearSampler.Get() };
		deviceContext->PSSetSamplers(0, 1, ppSS);
	}

	deviceContext->IASetInputLayout(m_inputLayout);
	deviceContext->IASetPrimitiveTopology(D3D11_PRIMITIVE_TOPOLOGY_POINTLIST);

	deviceContext->VSSetConstantBuffers(0, 1, &m_constantBuffer);
	deviceContext->GSSetConstantBuffers(0, 1, &m_constantBuffer);
	deviceContext->PSSetConstantBuffers(0, 1, &m_constantBuffer);