D3D11雾效示例程序

#include <WinApp.h> #include <Lights.h> #include <AppUtil.h> #include <GeometryGens.h> #include "Inputs.h" #include "Effects.h" #include <vector> #include <string> #include <RenderStates.h> using namespace std; enum RenderOptions { Light3Texture = 0, Light3TextureClip = 1, Light3TextureClipFog = 2, Light3TextureClipFogClip = 4 }; class BlendDemo: public WinApp { public: BlendDemo(HINSTANCE hInst, std::wstring title = L"D3D11学习 雾效的实现", int width = 640, int height = 480); ~BlendDemo(); bool Init(); bool Update(float delta); bool Render(); void OnMouseDown(WPARAM btnState, int x, int y); void OnMouseUp(WPARAM btnState, int x, int y); void OnMouseMove(WPARAM btnState, int x, int y); private: //创建顶点、索引缓冲区 bool BuildBuffers(); //创建ShaderResourceView bool BuildSRVs(); private: ID3D11Buffer *m_VB; ID3D11Buffer *m_IB; //3个平行光源（三点式照明） Lights::DirLight m_dirLights[3]; GeoGen::MeshData m_basin; //水池（包括池壁、池底） GeoGen::MeshData m_water; //水面 GeoGen::MeshData m_box; //箱子 Lights::Material m_materialWater; //水面材质 Lights::Material m_materialBasin; //水池材质 Lights::Material m_materialBox; //箱子材质 ID3D11ShaderResourceView *m_SRVBasin; //水池壁纹理 ID3D11ShaderResourceView *m_SRVBasinB; //水池底纹理 ID3D11ShaderResourceView *m_SRVWater; //水面纹理 ID3D11ShaderResourceView *m_SRVBox; //箱子纹理 XMFLOAT4X4 m_worldBasin; //世界变换矩阵 XMFLOAT4X4 m_worldViewProjBasin; //世界+视角+投影矩阵 XMFLOAT4X4 m_worldInvTransposeBasin; //世界矩阵的逆+转置，用于法线转换 XMFLOAT4X4 m_texTransBasin; //纹理坐标变换矩阵 XMFLOAT4X4 m_worldBasinB; //同上 XMFLOAT4X4 m_worldViewProjBasinB; XMFLOAT4X4 m_worldInvTransposeBasinB; XMFLOAT4X4 m_texTransBasinB; XMFLOAT4X4 m_worldBox; //同上 XMFLOAT4X4 m_worldViewProjBox; XMFLOAT4X4 m_worldInvTransposeBox; XMFLOAT4X4 m_texTransBox; XMFLOAT4X4 m_worldWater; //同上 XMFLOAT4X4 m_worldViewProjWater; XMFLOAT4X4 m_worldInvTransposeWater; XMFLOAT4X4 m_texTransWater; //用来标记各物体在顶点、索引缓冲区中的位置信息 UINT m_basinVStart, m_basinIStart; //水池壁的顶点、索引开始处 UINT m_basinBVStart, m_basinBIStart; //水池底的顶点、索引开始处 UINT m_basinICount, m_basinBICount; //水池壁、水池底的索引个数 UINT m_boxVStart, m_boxIStart; //箱子的顶点、索引开始处 UINT m_waterVStart, m_waterIStart; //水面的顶点、索引开始处 //雾效参数 float m_fogStart; float m_fogRange; XMFLOAT4 m_fogColor; RenderOptions m_options; //鼠标控制参数 float m_theta, m_phy; float m_radius; POINT m_lastPos; }; BlendDemo::BlendDemo(HINSTANCE hInst, std::wstring title, int width, int height):WinApp(hInst,title,width,height), m_VB(NULL), m_IB(NULL), m_SRVBasin(NULL), m_SRVBasinB(NULL), m_SRVBox(NULL), m_theta(0.25f*XM_PI), m_phy(XM_PI*0.45f), m_radius(8.f), m_fogStart(0.f), m_fogRange(20.f), m_fogColor(reinterpret_cast<const float*>(&Colors::Silver)), m_options(Light3TextureClipFogClip) { //"三点式"照明 //主光源 m_dirLights[0].ambient = XMFLOAT4(0.3f, 0.3f, 0.3f, 1.0f); m_dirLights[0].diffuse = XMFLOAT4(0.5f, 0.5f, 0.5f, 1.0f); m_dirLights[0].specular = XMFLOAT4(0.5f, 0.5f, 0.5f, 1.0f); m_dirLights[0].dir = XMFLOAT3(0.57735f, -0.57735f, 0.57735f); //侧光源 m_dirLights[1].ambient = XMFLOAT4(0.0f, 0.0f, 0.0f, 1.0f); m_dirLights[1].diffuse = XMFLOAT4(0.20f, 0.20f, 0.20f, 1.0f); m_dirLights[1].specular = XMFLOAT4(0.25f, 0.25f, 0.25f, 1.0f); m_dirLights[1].dir = XMFLOAT3(-0.57735f, -0.57735f, 0.57735f); //背光源 m_dirLights[2].ambient = XMFLOAT4(0.0f, 0.0f, 0.0f, 1.0f); m_dirLights[2].diffuse = XMFLOAT4(0.2f, 0.2f, 0.2f, 1.0f); m_dirLights[2].specular = XMFLOAT4(0.0f, 0.0f, 0.0f, 1.0f); m_dirLights[2].dir = XMFLOAT3(0.0f, -0.707f, -0.707f); //材质 m_materialBasin.ambient = XMFLOAT4(0.5f, 0.5f, 0.5f, 1.0f); m_materialBasin.diffuse = XMFLOAT4(1.f, 1.f, 1.f, 1.0f); m_materialBasin.specular = XMFLOAT4(0.3f, 0.3f, 0.3f, 16.0f); m_materialBox.ambient = XMFLOAT4(0.5f, 0.5f, 0.5f, 1.0f); m_materialBox.diffuse = XMFLOAT4(1.f, 1.f, 1.f, 1.0f); m_materialBox.specular = XMFLOAT4(0.3f, 0.3f, 0.3f, 16.0f); m_materialWater.ambient = XMFLOAT4(0.5f, 0.5f, 0.5f, 1.0f); m_materialWater.diffuse = XMFLOAT4(1.0f, 1.0f, 1.0f, 0.5f); m_materialWater.specular = XMFLOAT4(0.8f, 0.8f, 0.8f, 32.0f); //初始化各自的世界变换矩阵及其逆+转置矩阵、纹理坐标变换矩阵 //这些矩阵是固定不变的，因此一次初始化 XMMATRIX I = XMMatrixIdentity(); XMStoreFloat4x4(&m_worldBasin,I); XMStoreFloat4x4(&m_worldInvTransposeBasin,InverseTranspose(I)); XMStoreFloat4x4(&m_worldBasinB,I); XMStoreFloat4x4(&m_worldInvTransposeBasinB,InverseTranspose(I)); XMMATRIX wBox = XMMatrixTranslation(0.f,-0.9f,0.f); XMStoreFloat4x4(&m_worldBox,wBox); XMStoreFloat4x4(&m_worldInvTransposeBox,InverseTranspose(wBox)); XMMATRIX wWater = XMMatrixTranslation(0.f,-1.f,0.f); XMStoreFloat4x4(&m_worldWater,wWater); XMStoreFloat4x4(&m_worldInvTransposeWater,InverseTranspose(wWater)); XMMATRIX texTransBasin = XMMatrixScaling(10.f,1.f,1.f); XMMATRIX texTransWater = XMMatrixScaling(5.f,5.f,1.f); //纹理坐标变换矩阵 XMStoreFloat4x4(&m_texTransBasin,texTransBasin); XMStoreFloat4x4(&m_texTransBasinB,XMMatrixIdentity()); XMStoreFloat4x4(&m_texTransWater,texTransWater); XMStoreFloat4x4(&m_texTransBox,XMMatrixIdentity()); } BlendDemo::~BlendDemo() { SafeRelease(m_IB); SafeRelease(m_VB); SafeRelease(m_SRVBasin); SafeRelease(m_SRVBasinB); SafeRelease(m_SRVWater); SafeRelease(m_SRVBox); RenderStates::ReleaseAll(); InputLayouts::ReleaseAll(); Effects::ReleaseAll(); } bool BlendDemo::BuildBuffers() { //创建水池壁的顶点、索引（圆柱的侧壁） GeoGen::CreateCylinder(10.f,10.f,4.f,50,10,m_basin); m_basinVStart = 0; m_basinIStart = 0; m_basinICount = m_basin.indices.size(); m_basinBVStart = m_basin.vertices.size(); m_basinBIStart = m_basin.indices.size(); //添加水池底顶点、索引（圆柱的底） GeoGen::AddCylinderBottomCap(10.f,10.f,4.f,50,10,m_basin); m_basinBICount = m_basin.indices.size()-m_basinICount; //创建水面的顶点、索引（网格） GeoGen::CreateGrid(20.f,20.f,1,1,m_water); m_waterIStart = m_basin.indices.size(); m_waterVStart = m_basin.vertices.size(); //创建箱子的顶点、索引 GeoGen::CreateBox(2.f,2.f,2.f,m_box); m_boxIStart = m_waterIStart + m_water.indices.size(); m_boxVStart = m_waterVStart + m_water.vertices.size(); UINT totalV = m_basin.vertices.size()+m_water.vertices.size()+m_box.vertices.size(); UINT totalI = m_basin.indices.size()+m_water.indices.size()+m_box.indices.size(); //开始创建顶点缓冲区 D3D11_BUFFER_DESC vDesc = {0}; vDesc.ByteWidth = sizeof(Vertex::Basic32)*totalV; vDesc.BindFlags = D3D11_BIND_VERTEX_BUFFER; vDesc.Usage = D3D11_USAGE_IMMUTABLE; std::vector<Vertex::Basic32> vertices(totalV); for(UINT i=0; i<m_basin.vertices.size(); ++i) { vertices[i].pos = m_basin.vertices[i].pos; //法线方向取反 //对于水池壁，法线指向水池内侧；对于水池底，法线指向上方 XMFLOAT3 normal = m_basin.vertices[i].normal; vertices[i].normal = XMFLOAT3(-normal.x,-normal.y,-normal.z); vertices[i].tex = m_basin.vertices[i].tex; } for(UINT i=0; i<m_water.vertices.size(); ++i) { vertices[i+m_waterVStart].pos = m_water.vertices[i].pos; vertices[i+m_waterVStart].normal = m_water.vertices[i].normal; vertices[i+m_waterVStart].tex = m_water.vertices[i].tex; } for(UINT i=0; i<m_box.vertices.size(); ++i) { vertices[i+m_boxVStart].pos = m_box.vertices[i].pos; vertices[i+m_boxVStart].normal = m_box.vertices[i].normal; vertices[i+m_boxVStart].tex = m_box.vertices[i].tex; } D3D11_SUBRESOURCE_DATA vData; vData.pSysMem = &vertices[0]; vData.SysMemPitch = 0; vData.SysMemSlicePitch = 0; if(FAILED(m_d3dDevice->CreateBuffer(&vDesc,&vData,&m_VB))) { Message