OpenGL

开发平台：
Visual C++

render_dx10.cpp：源码内容
							#ifdef _ENABLE_DX10_
#include "Gut.h"
#include "render_data.h"
static ID3D10Device			*g_pDevice			= NULL;
static ID3D10InputLayout	*g_pVertexLayout	= NULL;
static ID3D10Buffer			*g_pPyramidVertexBuffer	= NULL;
static ID3D10Buffer			*g_pPyramidIndexBuffer	= NULL;
static ID3D10Buffer			*g_pRoadVertexBuffer	= NULL;
static ID3D10Buffer			*g_pRoadIndexBuffer		= NULL;
static ID3D10Buffer			*g_pConstantBuffer	= NULL;
static ID3D10VertexShader	*g_pVertexShader	= NULL;
static ID3D10PixelShader	*g_pPixelShader		= NULL;
static ID3D10RasterizerState *g_pRasterizerState= NULL;
static Matrix4x4 g_proj_matrix;
bool InitResourceDX10(void)
{
	g_pDevice = GutGetGraphicsDeviceDX10();
	ID3D10Blob *pVSCode = NULL;
	// 载入Vertex Shader
	g_pVertexShader = GutLoadVertexShaderDX10_HLSL("../../shaders/vertex_color_dx10.hlsl", "VS", "vs_4_0", &pVSCode);
	if ( NULL==g_pVertexShader )
		return false;
	// 载入Pixel Shader
	g_pPixelShader = GutLoadPixelShaderDX10_HLSL("../../shaders/vertex_color_dx10.hlsl", "PS", "ps_4_0");
	if ( NULL==g_pPixelShader )
		return false;
    // 设置Vertex数据格式
    D3D10_INPUT_ELEMENT_DESC layout[] =
	{
		{ "POSITION", 0, DXGI_FORMAT_R32G32B32_FLOAT, 0, 0,  D3D10_INPUT_PER_VERTEX_DATA, 0 },
		{ "COLOR", 0, DXGI_FORMAT_R8G8B8A8_UNORM, 0, 12, D3D10_INPUT_PER_VERTEX_DATA, 0 }
	};
    if ( D3D_OK != g_pDevice->CreateInputLayout( layout, sizeof(layout)/sizeof(D3D10_INPUT_ELEMENT_DESC), pVSCode->GetBufferPointer(), pVSCode->GetBufferSize(), &g_pVertexLayout ) )
		return false;
	SAFE_RELEASE(pVSCode);
	// 设置一块可以用来放Vertex的内存.
    D3D10_BUFFER_DESC cbDesc;
    cbDesc.ByteWidth = sizeof(g_pyramid_vertices);
    cbDesc.Usage = D3D10_USAGE_IMMUTABLE;
    cbDesc.BindFlags = D3D10_BIND_VERTEX_BUFFER;
    cbDesc.CPUAccessFlags = 0;
    cbDesc.MiscFlags = 0;
	// 打开Vertex Buffer时同时把数据拷贝过去
	D3D10_SUBRESOURCE_DATA sbDesc;
	sbDesc.pSysMem = g_pyramid_vertices;
	// 分配一块可以存放Vertex的内存, 也就是Vertex Buffer.
	if ( D3D_OK != g_pDevice->CreateBuffer( &cbDesc, &sbDesc, &g_pPyramidVertexBuffer ) )
		return false;
	cbDesc.ByteWidth = sizeof(g_road_vertices);
	sbDesc.pSysMem = g_road_vertices;
	// 分配一块可以存放Vertex的内存, 也就是Vertex Buffer.
	if ( D3D_OK != g_pDevice->CreateBuffer( &cbDesc, &sbDesc, &g_pRoadVertexBuffer ) )
		return false;
	// 设置一块可以用来放Index的内存.
    cbDesc.ByteWidth = sizeof(g_pyramid_trianglelist_indices);
    cbDesc.Usage = D3D10_USAGE_IMMUTABLE;
    cbDesc.BindFlags = D3D10_BIND_INDEX_BUFFER;
    cbDesc.CPUAccessFlags = 0;
    cbDesc.MiscFlags = 0;
	// 打开Index Buffer时同时把数据拷贝过去
	sbDesc.pSysMem = g_pyramid_trianglelist_indices;
    // 分配一块可以存放Index的内存, 也就是Index Buffer.
	if ( D3D_OK != g_pDevice->CreateBuffer( &cbDesc, &sbDesc, &g_pPyramidIndexBuffer ) )
		return false;
	cbDesc.ByteWidth = sizeof(g_road_trianglestrip_indices);
	sbDesc.pSysMem = g_road_trianglestrip_indices;
    // 分配一块可以存放Index的内存, 也就是Index Buffer.
	if ( D3D_OK != g_pDevice->CreateBuffer( &cbDesc, &sbDesc, &g_pRoadIndexBuffer ) )
		return false;
	// 分配Shader读取参数的内存空间
    cbDesc.ByteWidth = sizeof(Matrix4x4);
    cbDesc.Usage = D3D10_USAGE_DYNAMIC;
    cbDesc.BindFlags = D3D10_BIND_CONSTANT_BUFFER;
    cbDesc.CPUAccessFlags = D3D10_CPU_ACCESS_WRITE;
    cbDesc.MiscFlags = 0;
	if ( D3D_OK != g_pDevice->CreateBuffer( &cbDesc, NULL, &g_pConstantBuffer ) )
		return false;
	
	// 计算出一个可以转换到镜头坐标系的矩阵
	g_proj_matrix = GutMatrixPerspectiveRH_DirectX(90.0f, 1.0f, 0.1f, 100.0f);
	// 创建rasterizer state对象
	D3D10_RASTERIZER_DESC rasterizer_state_desc;
	
	rasterizer_state_desc.FillMode = D3D10_FILL_SOLID;
	rasterizer_state_desc.CullMode = D3D10_CULL_BACK;
	rasterizer_state_desc.FrontCounterClockwise = true;
	rasterizer_state_desc.DepthBias = 0;
	rasterizer_state_desc.DepthBiasClamp = 0.0f;
	rasterizer_state_desc.SlopeScaledDepthBias = 0.0f;
	rasterizer_state_desc.DepthClipEnable = false;
	rasterizer_state_desc.ScissorEnable = false;
	rasterizer_state_desc.MultisampleEnable = false;
	rasterizer_state_desc.AntialiasedLineEnable = false;
	if ( D3D_OK != g_pDevice->CreateRasterizerState(&rasterizer_state_desc, &g_pRasterizerState) )
		return false;
	g_pDevice->RSSetState(g_pRasterizerState);
	return true;
}
bool ReleaseResourceDX10(void)
{
 	SAFE_RELEASE(g_pVertexLayout);
 	SAFE_RELEASE(g_pPyramidVertexBuffer);
 	SAFE_RELEASE(g_pPyramidIndexBuffer);
 	SAFE_RELEASE(g_pRoadVertexBuffer);
 	SAFE_RELEASE(g_pRoadIndexBuffer);
 	SAFE_RELEASE(g_pConstantBuffer);
 	SAFE_RELEASE(g_pVertexShader);
 	SAFE_RELEASE(g_pPixelShader);
	SAFE_RELEASE(g_pRasterizerState);
	return true;
}
void RenderFrameDX10(void)
{
	Vector4 vClearColor(0.0f, 0.0f, 0.0f, 0.0f);
	UINT stride = sizeof(Vertex_VC);
	UINT offset = 0;
	// `获得调用GutCreateGraphicsDeviceDX10时所生成的D3D10对象`
	//frame buffer
	ID3D10RenderTargetView *pRenderTargetView = GutGetDX10RenderTargetView(); 
	//depth/stencil buffer
    ID3D10DepthStencilView *pDepthStencilView = GutGetDX10DepthStencilView(); 
	// front/back buffer
	IDXGISwapChain *pSwapChain = GutGetDX10SwapChain(); 
	// `清除颜色`
	g_pDevice->ClearRenderTargetView(pRenderTargetView, (float *)&vClearColor);
	// `清除Depth/Stencil buffer`
	g_pDevice->ClearDepthStencilView(pDepthStencilView, D3D10_CLEAR_DEPTH | D3D10_CLEAR_STENCIL, 1.0f, 0);
	// `设置vertex shader`
	g_pDevice->VSSetShader(g_pVertexShader);
	// `设置pixel shader`
	g_pDevice->PSSetShader(g_pPixelShader);
	// `设置vertex shader读取参数的内存位罝`
    g_pDevice->VSSetConstantBuffers(0, 1, &g_pConstantBuffer);
	// `设置vertex数据格式`
	g_pDevice->IASetInputLayout(g_pVertexLayout);
	// `计算出一个可以转换到镜头坐标系的矩阵`
	Matrix4x4 view_matrix = GutMatrixLookAtRH(g_eye, g_lookat, g_up);
	Matrix4x4 view_proj_matrix = view_matrix * g_proj_matrix;
	Vector4 border(-15.0f, 0.0f, -15.0f);
	Vector4 grid_position = border;
	const int grids_x = 30;
	const int grids_z = 30;
	for ( int x=0; x<grids_x; x++ )
	{
		grid_position[2] = border[2];
		int grid_x = x & 0x07;
		for ( int z=0; z<grids_z; z++ )
		{
			// `设置转换矩阵`
			Matrix4x4 object_matrix;
			object_matrix.Translate_Replace(grid_position);
			
			int grid_z = z & 0x07;
			char c = g_map[grid_x][grid_z];
			if ( c==0 )
			{
				Matrix4x4 world_view_proj_matrix = object_matrix * view_proj_matrix;
				// `设置shader参数`
				Matrix4x4 *pConstData;
				g_pConstantBuffer->Map( D3D10_MAP_WRITE_DISCARD, NULL, (void **) &pConstData );
				*pConstData = world_view_proj_matrix;
				g_pConstantBuffer->Unmap();
				// `设置vertex buffer`
				g_pDevice->IASetVertexBuffers(0, 1, &g_pRoadVertexBuffer, &stride, &offset);
				// `设置index buffer`
				g_pDevice->IASetIndexBuffer(g_pRoadIndexBuffer, DXGI_FORMAT_R16_UINT, 0);
				// `设置三角形顶点索引值数据排列是triangle strip`
				g_pDevice->IASetPrimitiveTopology(D3D10_PRIMITIVE_TOPOLOGY_TRIANGLESTRIP);
				// `画出道路`
				g_pDevice->DrawIndexed(4, 0, 0);
			}
			else
			{
				object_matrix.Scale_Replace(1.0f, (float) c, 1.0f);
				object_matrix[3] = grid_position;
				Matrix4x4 world_view_proj_matrix = object_matrix * view_proj_matrix;
				// `设置shader参数`
				Matrix4x4 *pConstData;
				g_pConstantBuffer->Map( D3D10_MAP_WRITE_DISCARD, NULL, (void **) &pConstData );
				*pConstData = world_view_proj_matrix;
				g_pConstantBuffer->Unmap();
				// `设置vertex buffer`
				g_pDevice->IASetVertexBuffers(0, 1, &g_pPyramidVertexBuffer, &stride, &offset);
				// `设置index buffer`
				g_pDevice->IASetIndexBuffer(g_pPyramidIndexBuffer, DXGI_FORMAT_R16_UINT, 0);
				// `设置三角形顶点索引值数据排列是triangle list`
				g_pDevice->IASetPrimitiveTopology(D3D10_PRIMITIVE_TOPOLOGY_TRIANGLELIST);
				// `画出金字塔`
				g_pDevice->DrawIndexed(12, 0, 0);
			}
			grid_position[2] += 1.0f;
		}
		grid_position[0] += 1.0f;
	}
	// `等待硬件扫描结束, 然后再更新画面.`
	pSwapChain->Present(1, 0);
}
#endif // _ENABLE_DX10_

						