[オフスクリーンレンダリング]の変更点 - OpenGLプログラミングメモ

オフスクリーンレンダリング

「オフスクリーンレンダリング」(2014/03/01 (土) 22:49:18) の最新版変更点

追加された行は緑色になります。

削除された行は赤色になります。

オフスクリーンレンダリングです。 レースゲームのバックミラーの描画等で使われます。 metasequiaに付属のviolin.mqoを.xに変換して使用しています。 <a href="http://cdn21.atwikiimg.com/opengl/pub/png/violin.x">violin.x</a>は<a href="http://cdn21.atwikiimg.com/opengl/pub/png/violin.x">ここ</a>からダウンロードして下さい。 右クリックして名前を付けてリンク先を保存でダウンロードできます。 <img alt="" src="http://cdn21.atwikiimg.com/opengl?cmd=upload&act=open&pageid=295&file=off.png" /> violin.png <img alt="" src="http://www21.atwiki.jp/opengl?cmd=upload&act=open&pageid=295&file=violin.png" /> vertex.shader <table cellspacing="1" cellpadding="1" width="600" border="1"><tbody><tr><td> varying vec3 P; varying vec3 N; void main(void) { P = vec3(gl_ModelViewMatrix * gl_Vertex); N = normalize(gl_NormalMatrix * gl_Normal).xyz; gl_TexCoord[0] = gl_MultiTexCoord0; gl_Position = ftransform(); } </td> </tr></tbody></table>flagment.shader <table cellspacing="1" cellpadding="1" width="600" border="1"><tbody><tr><td> varying vec3 P; varying vec3 N; uniform sampler2D sampler; void main(void) { vec3 L = normalize(gl_LightSource[0].position.xyz - P); N = normalize(N); vec4 ambient = gl_FrontLightProduct[0].ambient; float dotNL = dot(N, L);//max(0.0, dot(N, L)); vec4 diffuse = gl_FrontLightProduct[0].diffuse * max(0.0, dotNL); vec3 V = normalize(-P); vec3 H = normalize(L + V); float powNH = pow(max(dot(N, H), 0.0), gl_FrontMaterial.shininess); if(dotNL <= 0.0) powNH = 0.0; vec4 specular = gl_FrontLightProduct[0].specular * powNH; //テクスチャの色 vec4 texColor = texture2D(sampler, gl_TexCoord[0].st); //GL_MODULATEモード gl_FragColor = (ambient + diffuse) * texColor + specular; //任意の混合比 // gl_FragColor = mix(ambient + diffuse, texColor, 0.5) + specular; } </td> </tr></tbody></table>GLSL.h <table cellspacing="1" cellpadding="1" width="600" border="1"><tbody><tr><td>#pragma once #include <stdio.h> //GLSLクラス class GLSL{ public: GLuint ShaderProg; GLuint VertexShader, FragmentShader; void ReadShaderCompile(GLuint Shader, const char *File);//shader fileを読み込みコンパイルする void Link( GLuint Prog );//リンクする void InitGLSL(const char *VertexFile);//GLSLの初期化 void InitGLSL(const char *VertexFile, const char *FragmentFile);//GLSLの初期化 void ON();//シェーダー描画に切り替え void OFF();//シェーダー解除 ~GLSL(); }; void GLSL::ReadShaderCompile(GLuint Shader, const char *File){ FILE *fp; char *buf; GLsizei size, len; GLint compiled; fopen_s(&fp,File, "rb"); if(!fp) printf("ファイルを開くことができません %s\n", File); fseek(fp, 0, SEEK_END); size = ftell(fp); buf = (GLchar *)malloc(size); if (buf == NULL) { printf("メモリが確保できませんでした \n"); } fseek(fp, 0, SEEK_SET); fread(buf, 1, size, fp); glShaderSource(Shader, 1, (const GLchar **)&buf, &size); free(buf); fclose(fp); glCompileShader(Shader); glGetShaderiv( Shader, GL_COMPILE_STATUS, &compiled ); if ( compiled == GL_FALSE ) { printf( "コンパイルできませんでした!!: %s \n ", File); glGetProgramiv( Shader, GL_INFO_LOG_LENGTH, &size ); if ( size > 0 ) { buf = (char *)malloc(size); glGetShaderInfoLog( Shader, size, &len, buf); printf(buf); free(buf); } } } void GLSL::Link( GLuint Prog ){ GLsizei size, len; GLint linked; char *infoLog ; glLinkProgram( Prog ); glGetProgramiv( Prog, GL_LINK_STATUS, &linked ); if ( linked == GL_FALSE ){ printf("リンクできませんでした!! \n"); glGetProgramiv( Prog, GL_INFO_LOG_LENGTH, &size ); if ( size > 0 ){ infoLog = (char *)malloc(size); glGetProgramInfoLog( Prog, size, &len, infoLog ); printf(infoLog); free(infoLog); } } } void GLSL::InitGLSL(const char *VertexFile){ GLenum err = glewInit(); if (err != GLEW_OK) { printf("Error: %s\n", glewGetErrorString(err)); } printf("VENDOR= %s \n", glGetString(GL_VENDOR)); printf("GPU= %s \n", glGetString(GL_RENDERER)); printf("OpenGL= %s \n", glGetString(GL_VERSION)); printf("GLSL= %s \n", glGetString(GL_SHADING_LANGUAGE_VERSION)); VertexShader = glCreateShader(GL_VERTEX_SHADER); ReadShaderCompile(VertexShader, VertexFile); ShaderProg = glCreateProgram(); glAttachShader(ShaderProg, VertexShader); glDeleteShader(VertexShader); Link(ShaderProg); } void GLSL::InitGLSL(const char *VertexFile, const char *FragmentFile){ GLenum err = glewInit(); if (err != GLEW_OK) { printf("Error: %s\n", glewGetErrorString(err)); } printf("VENDOR= %s \n", glGetString(GL_VENDOR)); printf("GPU= %s \n", glGetString(GL_RENDERER)); printf("OpenGL= %s \n", glGetString(GL_VERSION)); printf("GLSL= %s \n", glGetString(GL_SHADING_LANGUAGE_VERSION)); VertexShader = glCreateShader(GL_VERTEX_SHADER); FragmentShader = glCreateShader(GL_FRAGMENT_SHADER); ReadShaderCompile(VertexShader, VertexFile); ReadShaderCompile(FragmentShader, FragmentFile); ShaderProg = glCreateProgram(); glAttachShader(ShaderProg, VertexShader); glAttachShader(ShaderProg, FragmentShader); glDeleteShader(VertexShader); glDeleteShader(FragmentShader); Link(ShaderProg); } void GLSL::ON(){ glUseProgram(ShaderProg); } void GLSL::OFF(){ glUseProgram(0); } GLSL::~GLSL(){ glDeleteProgram(ShaderProg); } </td> </tr></tbody></table>PNG.h <table cellspacing="1" cellpadding="1" width="600" border="1"><tbody><tr><td> #pragma once #include "lodepng.h" //テクスチャクラス class TEXTURE{ protected: LodePNG_Decoder decoder;//デコーダ unsigned char* buffer;//バッファ size_t buffersize, imagesize;//サイズ public: TEXTURE(); TEXTURE(const char* FileName);//コンストラクタ void LOAD_PNG(const char* FileName);//PNG読み込み unsigned char* image;//イメージポインタ unsigned int Width,Height;//画像サイズ }; TEXTURE::TEXTURE(){ } TEXTURE::TEXTURE(const char* FileName){ LOAD_PNG(FileName); } void TEXTURE::LOAD_PNG(const char* FileName){ LodePNG_Decoder_init(&decoder); //ロード LodePNG_loadFile(&buffer, &buffersize, FileName); //デコード LodePNG_decode(&decoder, &image, &imagesize, buffer, buffersize); //幅,高さ Width = decoder.infoPng.width;Height = decoder.infoPng.height; } </td> </tr></tbody></table>xfile.h <table cellspacing="1" cellpadding="1" width="600" border="1"><tbody><tr><td> #include "PNG.h" using namespace std; //3つのベクトル struct Vector3f{ float x; float y; float z; }vec3d; Vector3f & operator*(Vector3f &v,float size){ v.x *= size; v.y *= size; v.z *= size; return v; } //4つのベクトル struct Vector4f{ float x; float y; float z; float w; }vec4d; //4つのカラー struct Color4{ float r; float g; float b; float a; }; //4つの反射 struct Reflection4{ Color4 diffuse; Color4 ambient; Color4 emission; Color4 specular; }; //UV座標 struct UV{ float u;//u値 float v;//v値 }vec2d; //ポリゴンデータ struct Triangle{ Vector3f TriVer; Vector3f TriNor; UV TriUV; }Tri; //ポリゴンデータ struct Quadrangle{ Vector3f QuadVer; Vector3f QuadNor; UV QuadUV; }Quad; //マテリアル構造体 struct MATERIAL{ string MaterialName;//マテリアル名 Reflection4 MaterialColor;//反射 float Shininess;//shininess string TextureName;//テクスチャ名 int TexNo;//テクスチャNO. vector <Triangle> Tridata;//三角面データ vector <Quadrangle> Quaddata;//四角面データ }mtl; //モデルクラス class MODEL{ protected: vector <MATERIAL> Material;//マテリアル vector <TEXTURE*> TexData;//テクスチャデータ vector<GLuint> TexID;//テクスチャID GLuint TexID2;//代入用 TEXTURE* tex;//代入用 public: MODEL(); MODEL(char* FileName,int size);//コンストラクタ bool XFILE_Load(char* FileName,int size);//ロード void Draw(); }; MODEL::MODEL(){ } MODEL::MODEL(char* FileName,int size){ XFILE_Load(FileName, size); } //描画 void MODEL::Draw(){ glEnableClientState(GL_VERTEX_ARRAY); glEnableClientState(GL_NORMAL_ARRAY); for(int i=0;i<(signed)Material.size();i++){ glPushMatrix(); glMaterialfv(GL_FRONT_AND_BACK,GL_AMBIENT,(const GLfloat *)&Material[i].MaterialColor.ambient); glMaterialfv(GL_FRONT_AND_BACK,GL_DIFFUSE,(const GLfloat *)&Material[i].MaterialColor.diffuse); glMaterialfv(GL_FRONT_AND_BACK,GL_SPECULAR,(const GLfloat *)&Material[i].MaterialColor.specular); glMaterialf(GL_FRONT_AND_BACK,GL_SHININESS,Material[i].Shininess); if(Material[i].TexNo>0){ glEnableClientState(GL_TEXTURE_COORD_ARRAY); glEnable(GL_TEXTURE_2D); glBindTexture(GL_TEXTURE_2D, TexID[Material[i].TexNo-1]); }else{ glDisable(GL_TEXTURE_2D); glDisableClientState(GL_TEXTURE_COORD_ARRAY); } if(Material[i].Tridata.size()>1){ glVertexPointer(3, GL_FLOAT,sizeof(Tri) , &Material[i].Tridata[0].TriVer.x); glNormalPointer(GL_FLOAT,sizeof(Tri),&Material[i].Tridata[0].TriNor.x); if(Material[i].TexNo>0)glTexCoordPointer(2, GL_FLOAT, sizeof(Tri), &Material[i].Tridata[0].TriUV.u); glDrawArrays(GL_TRIANGLES,0,Material[i].Tridata.size()); } if(Material[i].Quaddata.size()>1){ glVertexPointer(3, GL_FLOAT,sizeof(Quad) , &Material[i].Quaddata[0].QuadVer.x); glNormalPointer(GL_FLOAT,sizeof(Quad),&Material[i].Quaddata[0].QuadNor.x); if(Material[i].TexNo>0)glTexCoordPointer(2, GL_FLOAT, sizeof(Quad), &Material[i].Quaddata[0].QuadUV.u); glDrawArrays(GL_QUADS,0,Material[i].Quaddata.size()); } glPopMatrix(); } glDisableClientState(GL_VERTEX_ARRAY); glDisableClientState(GL_NORMAL_ARRAY); glDisableClientState(GL_TEXTURE_COORD_ARRAY); glDisable(GL_TEXTURE_2D); } //Xファイル読み込み bool MODEL::XFILE_Load(char* FileName,int size){ vector <Vector3f> Vertex;//頂点 vector <Vector3f> Normal;//法線 vector <UV> uv;//UV vector <int> VertexIndex; vector <int> NormalIndex; vector <int> MaterialIndex; vector <int> FaceIndex; char key[255]; char buf[255]; //Xファイルを開いて内容を読み込む FILE* fp=NULL; fopen_s(&fp,FileName,"rt"); int v1=0,v2=0,v3=0,v4=0; int Count=0; bool flag=false; string str=""; //読み込み fseek(fp,SEEK_SET,0); while(!feof(fp)) { //キーワード読み込み ZeroMemory(key,sizeof(key)); fscanf_s(fp,"%s ",key,sizeof(key)); //テンプレート読み飛ばし if(strcmp(key,"template")==0){ while(strcmp(key,"}")){ fscanf_s(fp,"%s ",key,sizeof(key)); } continue; } //マテリアル読み込み if(strcmp(key,"Material")==0) { if(flag)Material.push_back(mtl); flag=true; fgets(buf,sizeof(buf),fp);//直後の行にあると推定　改行する //ディフューズ fscanf_s(fp,"%f;%f;%f;%f;;",&vec4d.x,&vec4d.y,&vec4d.z,&vec4d.w); mtl.MaterialColor.diffuse=(const Color4 &)vec4d; //SHININESS fscanf_s(fp,"%f;",&mtl.Shininess); //スペキュラー fscanf_s(fp,"%f;%f;%f;;",&vec4d.x,&vec4d.y,&vec4d.z); mtl.MaterialColor.specular=(const Color4 &)vec4d; //エミッシブ fscanf_s(fp,"%f;%f;%f;;",&vec4d.x,&vec4d.y,&vec4d.z); mtl.MaterialColor.ambient=(const Color4 &)vec4d; //テクスチャー fscanf_s(fp,"%s ",key,sizeof(key)); if(strcmp(key,"TextureFilename")==0) { fgets(buf,sizeof(buf),fp);//直後の行にあると推定　改行する //map_Kd　テクスチャー fscanf_s(fp,"%s",buf,255); mtl.TextureName=buf; str=mtl.TextureName; mtl.TextureName=str.substr(str.find_first_of('\"',0)+1,str.find_last_of('\"',255)-1); //テクスチャを作成 TexData.push_back(tex); TexData[TexData.size()-1] = new TEXTURE(mtl.TextureName.c_str());; mtl.TexNo=TexData.size(); TexID.push_back(TexID2); glGenTextures(1, (GLuint *)&TexID[TexData.size()-1]); glBindTexture(GL_TEXTURE_2D, TexID[TexData.size()-1]); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT); glEnable(GL_TEXTURE_2D); glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA,TexData[TexData.size()-1]->Width, TexData[TexData.size()-1]->Height, 0,GL_RGBA, GL_UNSIGNED_BYTE, TexData[TexData.size()-1]->image); glDisable(GL_TEXTURE_2D); } } //頂点読み込み if(strcmp(key,"Mesh")==0) { fgets(buf,sizeof(buf),fp);//データは2行下にあると推定　改行する fgets(buf,sizeof(buf),fp); Count=atoi(buf); for(int i=0;i<Count ;i++) { fscanf_s(fp,"%f;%f;%f;,",&vec3d.x,&vec3d.y,&vec3d.z); Vertex.push_back(vec3d*(float)size); } //頂点インデックス読み込み fgets(buf,sizeof(buf),fp);//データは2行下にあると推定　改行する fgets(buf,sizeof(buf),fp); while(strchr(buf,';')==NULL){fgets(buf,sizeof(buf),fp);}//空行対策 Count=atoi(buf); for(int i=0;i<Count ;i++) { int dammy=0; fgets(buf,sizeof(buf),fp); str=buf; string::size_type first = str.find_first_not_of(" "); string::size_type index = str.find("3;"); if(index-first==0){ sscanf_s(buf,"%d;%d,%d,%d;,",&dammy,&v1,&v2,&v3); VertexIndex.push_back(v1); VertexIndex.push_back(v2); VertexIndex.push_back(v3); } if((index==-1)||(index-first>1)){ sscanf_s(buf,"%d;%d,%d,%d,%d;,",&dammy,&v1,&v2,&v3,&v4); VertexIndex.push_back(v1); VertexIndex.push_back(v2); VertexIndex.push_back(v3); VertexIndex.push_back(v4); } FaceIndex.push_back(dammy); } } //法線読み込み if(strcmp(key,"MeshNormals")==0) { fgets(buf,sizeof(buf),fp);//データは2行下にあると推定　改行する fgets(buf,sizeof(buf),fp); Count=atoi(buf); for(int i=0;i<Count ;i++) { fscanf_s(fp,"%f;%f;%f;,",&vec3d.x,&vec3d.y,&vec3d.z); Normal.push_back(vec3d); } //法線インデックス読み込み fgets(buf,sizeof(buf),fp);//データは2行下にあると推定　改行する fgets(buf,sizeof(buf),fp); while(strchr(buf,';')==NULL){fgets(buf,sizeof(buf),fp);}//空行対策 Count=atoi(buf); for(int i=0;i<Count ;i++) { int dammy=0; fgets(buf,sizeof(buf),fp); str=buf; string::size_type first = str.find_first_not_of(" "); string::size_type index = str.find("3;"); if(index-first==0){ sscanf_s(buf,"%d;%d,%d,%d;,",&dammy,&v1,&v2,&v3); NormalIndex.push_back(v1); NormalIndex.push_back(v2); NormalIndex.push_back(v3); } if((index==-1)||(index-first>1)){ sscanf_s(buf,"%d;%d,%d,%d,%d;,",&dammy,&v1,&v2,&v3,&v4); NormalIndex.push_back(v1); NormalIndex.push_back(v2); NormalIndex.push_back(v3); NormalIndex.push_back(v4); } } } //テクスチャー座標読み込み if(strcmp(key,"MeshTextureCoords")==0) { fgets(buf,sizeof(buf),fp);//データは2行下にあると推定　改行する fgets(buf,sizeof(buf),fp); while(strchr(buf,';')==NULL){fgets(buf,sizeof(buf),fp);}//空行対策 Count=atoi(buf); for(int i=0;i<Count ;i++) { fscanf_s(fp,"%f;%f;,",&vec2d.u,&vec2d.v); uv.push_back(vec2d); } } //マテリアルリスト if(strcmp(key,"MeshMaterialList")==0) { fgets(buf,sizeof(buf),fp);//空改行 fgets(buf,sizeof(buf),fp);//マテリアル数 fgets(buf,sizeof(buf),fp);//リスト要素数 Count=atoi(buf); for(int i=0;i<Count;i++) { fgets(buf,sizeof(buf),fp); int test=atoi(buf); MaterialIndex.push_back(test); } } } if(flag)Material.push_back(mtl); fclose(fp); Count=0; //マテリアル毎のデータを作成 for(int i=0;i<(signed)MaterialIndex.size();i++){ if(FaceIndex[i]==3){ for(int j=0;j<3;j++){ Tri.TriVer=Vertex[VertexIndex[Count+j]]; Tri.TriNor=Normal[NormalIndex[Count+j]]; Tri.TriUV=uv[VertexIndex[Count+j]]; Material[MaterialIndex[i]].Tridata.push_back(Tri); } Count+=3; }else{ for(int j=0;j<4;j++){ Quad.QuadVer=Vertex[VertexIndex[Count+j]]; Quad.QuadNor=Normal[NormalIndex[Count+j]]; Quad.QuadUV=uv[VertexIndex[Count+j]]; Material[MaterialIndex[i]].Quaddata.push_back(Quad); } Count+=4; } } Vertex.clear(); Normal.clear(); uv.clear(); VertexIndex.clear(); NormalIndex.clear(); MaterialIndex.clear(); FaceIndex.clear(); return true; } </td> </tr></tbody></table>main.cpp <table cellspacing="1" cellpadding="1" width="600" border="1"><tbody><tr><td> #pragma comment(linker, "/SUBSYSTEM:WINDOWS /ENTRY:mainCRTStartup") #pragma comment(lib, "glew32.lib") #include <windows.h> #include <GL/glew.h> #include "GLSL.h" #include <math.h> #include <GL/freeglut/freeglut.h> #include "xfile.h" float pos[] = { 0.0, 1.0, 0.0}; float scale[][3] = { 1.0, 1.0, 1.0 }; float angle[][3] = { 0.0, 0.0, 0.0}; float lightPos[] = {-5.0, 5.0, 5.0, 1.0}; float lightPosR[] = {5.0,-5.0, -5.0, 1.0};//光源位置(反射用） float shadowDiffuse[] = {0.0,0.0,0.0,0.3}; float shadowSpecular[] = {0.0,0.0,0.0,1.0}; struct View{ float pos[3]; float cnt[3]; float dist; float theta; float phi; float fovY; float nearZ; float farZ; }; View view = { 0.0, 0.0, 0.0, 0.0, 1.0, 0.0, 10.0, 30.0, 20.0, 30.0, 1.0, 100.0 }; View view0 = view; GLSL glsl; TEXTURE *texture[2]; MODEL* model; #define PAI 3.141592f int width = 640; int height = 480; GLuint texName[2]; int xStart, yStart; bool flagMouse = false; bool flagShadow = false; int objNo = 0; float ang = 0.0; float dang = 0.1; #define TEX_WIDTH 512 #define TEX_HEIGHT 512 void drawCube(float s){ float p[8][3] = { {0.5*s,0.5*s,0.5*s}, {-0.5*s,0.5*s,0.5*s}, {-0.5*s,-0.5*s,0.5*s}, {0.5*s,-0.5*s,0.5*s},{0.5*s,0.5*s,-0.5*s}, {-0.5*s,0.5*s,-0.5*s}, {-0.5*s,-0.5*s,0-0.5*s}, {0.5*s,-0.5*s,-0.5*s} }; glBegin(GL_QUADS); glNormal3f(0.0f,0.0f,1.0f); //z方向 glVertex3fv(p[0]); glVertex3fv(p[1]); glVertex3fv(p[2]); glVertex3fv(p[3]); glNormal3f(1.0f,0.0f,0.0f); //x方向(正面） glVertex3fv(p[0]); glVertex3fv(p[3]); glVertex3fv(p[7]); glVertex3fv(p[4]); glNormal3f(0.0f,1.0f,0.0f); //y方向 glVertex3fv(p[0]); glVertex3fv(p[4]); glVertex3fv(p[5]); glVertex3fv(p[1]); glNormal3f(-1.0f,0.0f,0.0f); //-x方向 glVertex3fv(p[1]); glVertex3fv(p[5]); glVertex3fv(p[6]); glVertex3fv(p[2]); glNormal3f(0.0f,-1.0f,0.0f); //-y方向 glVertex3fv(p[2]); glVertex3fv(p[6]); glVertex3fv(p[7]); glVertex3fv(p[3]); glNormal3f(0.0f,0.0f,-1.0f); //-z方向 glVertex3fv(p[4]); glVertex3fv(p[7]); glVertex3fv(p[6]); glVertex3fv(p[5]); glEnd(); } void drawTexCube(float size, int nRepeatS, int nRepeatT){ float sz = 0.5 * size; float p[8][3] ={ { sz, sz, sz}, {-sz, sz, sz}, {-sz,-sz, sz}, { sz,-sz, sz}, { sz, sz,-sz}, {-sz, sz,-sz}, {-sz,-sz,-sz}, { sz,-sz,-sz} }; float s = (float)nRepeatS; float t = (float)nRepeatT; glEnable(GL_TEXTURE_2D); glBegin(GL_QUADS); //top(z軸が鉛直軸のときz方向） glNormal3f(0.0f,0.0f,1.0f); glTexCoord2f( s , 0.0); glVertex3fv(p[0]); glTexCoord2f( s , t ); glVertex3fv(p[1]); glTexCoord2f(0.0, t ); glVertex3fv(p[2]); glTexCoord2f(0.0, 0.0); glVertex3fv(p[3]); //x方向(正面） glNormal3f(1.0f,0.0f,0.0f); glTexCoord2f( s , t ); glVertex3fv(p[0]); glTexCoord2f(0.0, t ); glVertex3fv(p[3]); glTexCoord2f(0.0, 0.0); glVertex3fv(p[7]); glTexCoord2f( s , 0.0); glVertex3fv(p[4]); //y方向 glNormal3f(0.0f,1.0f,0.0f); glTexCoord2f(0.0, t ); glVertex3fv(p[0]); glTexCoord2f(0.0, 0.0); glVertex3fv(p[4]); glTexCoord2f( s , 0.0); glVertex3fv(p[5]); glTexCoord2f( s , t ); glVertex3fv(p[1]); //-x方向 glNormal3f(-1.0f,0.0f,0.0f); glTexCoord2f(0.0, t ); glVertex3fv(p[6]); glTexCoord2f(0.0, 0.0); glVertex3fv(p[2]); glTexCoord2f( s , 0.0); glVertex3fv(p[1]); glTexCoord2f( s , t ); glVertex3fv(p[5]); //-y方向 glNormal3f(0.0f,-1.0f,0.0f); glTexCoord2f(0.0, t ); glVertex3fv(p[2]); glTexCoord2f(0.0, 0.0); glVertex3fv(p[6]); glTexCoord2f( s , 0.0); glVertex3fv(p[7]); glTexCoord2f( s , t ); glVertex3fv(p[3]); //-z方向 glNormal3f(0.0f,0.0f,-1.0f); glTexCoord2f(0.0, 0.0); glVertex3fv(p[6]); glTexCoord2f( s , 0.0); glVertex3fv(p[5]); glTexCoord2f( s , t ); glVertex3fv(p[4]); glTexCoord2f(0.0, t ); glVertex3fv(p[7]); glEnd(); glDisable(GL_TEXTURE_2D); } void TexCreate(int NO,char* FileName){ glGenTextures(1, &texName[NO]); texture[NO] = new TEXTURE(FileName); glPixelStorei(GL_UNPACK_ALIGNMENT, 1); //テクスチャオブジェクトの作成 glBindTexture(GL_TEXTURE_2D, texName[NO]); //テクスチャの指定 glTexImage2D(GL_TEXTURE_2D,0,GL_RGBA,texture[NO]->Width,texture[NO]->Height,0,GL_RGBA,GL_UNSIGNED_BYTE,texture[NO]->image); //テクスチャの繰り返し方法の指定 glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_S,GL_REPEAT);//GL_CLAMP); glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_T,GL_REPEAT);//GL_CLAMP); //テクスチャを拡大・縮小する方法の指定 glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);//NEAREST); glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR);//NEAREST); glBindTexture(GL_TEXTURE_2D, 0); } void resize(int w, int h){ glViewport(0, 0, w, h); glMatrixMode(GL_PROJECTION); glLoadIdentity(); gluPerspective(view.fovY, (double)w/(double)h, view.nearZ, view.farZ); glMatrixMode(GL_MODELVIEW); glLoadIdentity(); width = w; height = h; } void setCamera(){ float pp = PAI / 180.0f; view.pos[2] = view.cnt[2] + view.dist * cos(pp * view.theta) * cos(pp * view.phi);//z view.pos[0] = view.cnt[0] + view.dist * cos(pp * view.theta) * sin(pp * view.phi);//x view.pos[1] = view.cnt[1] + view.dist * sin(pp * view.theta);//y resize(width, height); } void setLight(){ float lightAmbient0[] = {0.5, 0.5, 0.5, 1.0}; //環境光 float lightDiffuse0[] = {1.0, 1.0, 1.0, 1.0}; //拡散光 float lightSpecular0[] = {1.0, 1.0, 1.0, 1.0};//鏡面光 glLightfv(GL_LIGHT0, GL_AMBIENT, lightAmbient0); glLightfv(GL_LIGHT0, GL_DIFFUSE, lightDiffuse0); glLightfv(GL_LIGHT0, GL_SPECULAR, lightSpecular0); glLightfv(GL_LIGHT0, GL_POSITION, lightPos); glEnable(GL_LIGHT0); glEnable(GL_LIGHTING); } void Init(void){ glsl.InitGLSL("vertex.shader","flagment.shader"); glClearColor(1.0f, 1.0f, 1.0f, 1.0f); setCamera(); setLight(); glEnable(GL_DEPTH_TEST); glEnable(GL_NORMALIZE); TexCreate(0,"marble.png"); TexCreate(1,"marble.png"); model = new MODEL("violin.x",2); } void idle(void){ //再描画 glutPostRedisplay(); } void drawFloor(float widthX, float widthZ){ float diffuse[] = { 0.8, 0.8, 0.8, 1.0}; float ambient[] = { 0.2, 0.2, 0.2, 1.0}; float specular[]= { 0.5, 0.5, 0.5, 1.0}; glMaterialfv(GL_FRONT,GL_AMBIENT,ambient); glMaterialfv(GL_FRONT,GL_SPECULAR,specular); glMaterialf(GL_FRONT,GL_SHININESS,10); glEnable(GL_TEXTURE_2D); glNormal3d(0.0, 1.0, 0.0); glPushMatrix(); glMaterialfv(GL_FRONT, GL_DIFFUSE, diffuse); glBegin(GL_QUADS); glTexCoord2f(0.0, 0.0);glVertex3d(widthX, 0.0, widthZ); glTexCoord2f( 1.0 , 0.0);glVertex3d(widthX, 0.0, -widthZ); glTexCoord2f( 1.0 , 1.0 );glVertex3d(-widthX, 0.0, -widthZ); glTexCoord2f(0.0, 1.0 );glVertex3d(-widthX, 0.0, widthZ); glEnd(); glPopMatrix(); glDisable(GL_TEXTURE_2D); } void draw_obj(void){ float ambient[] = { 0.3, 0.3, 0.3, 1.0}; float diffuse[] = { 0.7, 0.7, 0.7, 1.0}; float specular[]= { 0.5, 0.5, 0.5, 1.0}; if(flagShadow) { glMaterialfv(GL_FRONT,GL_AMBIENT_AND_DIFFUSE,shadowDiffuse); glMaterialfv(GL_FRONT,GL_SPECULAR,shadowSpecular); } else { glMaterialfv(GL_FRONT,GL_AMBIENT,ambient); glMaterialfv(GL_FRONT,GL_DIFFUSE,diffuse); glMaterialfv(GL_FRONT,GL_SPECULAR,specular); glMaterialf(GL_FRONT,GL_SHININESS,100); } glPushMatrix(); glTranslatef(pos[0], pos[1], pos[2]); glRotatef(angle[0][2], 0.0, 0.0, 1.0);//z軸回転 glRotatef(angle[0][1]+ ang, 0.0, 1.0, 0.0);//y軸回転 glRotatef(angle[0][0], 1.0, 0.0, 0.0);//x軸回転 glScalef(scale[0][0], scale[0][1], scale[0][2]); //オブジェクト形状 if(!flagShadow) { drawTexCube(1.5, 1, 1); } else {//影表示のときはTextureを付けない drawCube(1.5); } glPopMatrix(); } void mouse(int button, int state, int x, int y){ float pp = PAI / 180.0f; if(button == GLUT_LEFT_BUTTON && state == GLUT_DOWN){ xStart = x; yStart = y; flagMouse = true; }else if(button == GLUT_RIGHT_BUTTON && state == GLUT_DOWN){ if(x > width/4 && x < 3*width/4 && y > height/4 && y < 3*height/4){ }else if(( x < width/4 || x > 3*width/4) && (y > height/4 && y < 3*height/4)){ if(x < width/4 ) view.phi -= 1.0; else view.phi += 1.0; view.cnt[2] = view.pos[2] - view.dist * cos(pp * view.phi) * cos(pp * view.theta); view.cnt[0] = view.pos[0] - view.dist * sin(pp * view.phi) * cos(pp * view.theta); }else if((x > width/4 && x < 3*width/4) && (y < height/4 || y > 3*height/4)){ if( y < height/4){ view.theta += 1.0; }else{ view.theta -= 1.0; } view.cnt[2] = view.pos[2] - view.dist * cos(pp * view.theta) * cos(pp * view.phi); view.cnt[0] = view.pos[0] - view.dist * cos(pp * view.theta) * sin(pp * view.phi); view.cnt[1] = view.pos[1] - view.dist * sin(pp * view.theta); }else if(x < width/8 && y > 7*height/8) view.fovY -= 1.0;//zoom in else if(x > 7*width/8 && y > 7*height/8) view.fovY += 1.0;//zoom out }else flagMouse = false; if(state == GLUT_DOWN) setCamera(); } void motion(int x, int y){ if(!flagMouse) return; if(cos(PAI * view.theta /180.0f) >= 0.0f){ view.phi -= 0.5f * (float)(x - xStart) ;//tumble }else{ view.phi += 0.5f * (float)(x - xStart) ;//tumble } view.theta += 0.5f * (float)(y - yStart) ;//crane setCamera(); xStart = x; yStart = y; } void CalcShadowMat(int ID, float* mat){ float ex, ey, ez;//光源の方向 float a, b, c, d;//床の面のパラメータ float s; //object中心から光源までの距離 float x, y, z; x = lightPos[0]; y = lightPos[1]; z = lightPos[2]; //光源の方向ベクトル s = sqrt(x * x + y * y + z * z); ex = x / s; ey = y / s; ez = z / s; //フロアの方向ベクトル(ｙ方向） a = 0.0f; b = 1.0f; c = 0.0f; d = -0.001f; //フロアと影の干渉を防ぐため mat[0] = b * ey + c * ez; mat[1] = -a * ey; mat[2] = -a * ez; mat[3] = 0.0f; mat[4] = -b * ex; mat[5] = a * ex + c * ez; mat[6] = -b * ez; mat[7] = 0.0f; mat[8] = -c * ex; mat[9] = -c * ey; mat[10] = a * ex + b * ey; mat[11] = 0.0f; mat[12] = -d * ex; mat[13] = -d * ey; mat[14] = -d * ez; mat[15] = a * ex + b * ey + c * ez; } void drawShadow(int objNo){ float mat[16]; flagShadow = true; glEnable(GL_BLEND); glBlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA); glDepthMask(GL_FALSE); CalcShadowMat(objNo, mat); glPushMatrix(); glMultMatrixf(mat); if(objNo == 0) draw_obj(); glDepthMask(GL_TRUE); glDisable(GL_BLEND); flagShadow = false; } void display(void){ //textureの作成 glClearColor( 1.0, 1.0, 1.0, 1.0 ); glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT ); glViewport( 0, 0, TEX_WIDTH, TEX_HEIGHT ); glMatrixMode( GL_PROJECTION ); glLoadIdentity(); gluPerspective(view.fovY, (double)TEX_WIDTH/(double)TEX_HEIGHT, view.nearZ, view.farZ); glMatrixMode( GL_MODELVIEW ); glLoadIdentity(); if(cos(PAI * view.theta /180.0) >= 0.0) gluLookAt(view.pos[0], view.pos[1], view.pos[2], view.cnt[0], view.cnt[1], view.cnt[2], 0.0, 1.0, 0.0); else gluLookAt(view.pos[0], view.pos[1], view.pos[2], view.cnt[0], view.cnt[1], view.cnt[2], 0.0, -1.0, 0.0); glPushMatrix(); glTranslatef(0.0, 1.0, 0.0); glRotatef(-90.0, 1.0, 0.0, 0.0); glRotatef(-90.0, 0.0, 0.0, 1.0); model->Draw(); glPopMatrix(); glBindTexture(GL_TEXTURE_2D, texName[1]); glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 0, 0, TEX_WIDTH, TEX_HEIGHT); glBindTexture(GL_TEXTURE_2D, 0); //通常のrendering resize(width, height); glClearColor(0.7, 0.7, 0.9, 1.0); glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glLoadIdentity(); if(cos(PAI * view.theta /180.0) >= 0.0) gluLookAt(view.pos[0], view.pos[1], view.pos[2], view.cnt[0], view.cnt[1], view.cnt[2], 0.0, 1.0, 0.0); else gluLookAt(view.pos[0], view.pos[1], view.pos[2], view.cnt[0], view.cnt[1], view.cnt[2], 0.0, -1.0, 0.0); glLightfv(GL_LIGHT0, GL_POSITION, lightPos); //描画 glBindTexture(GL_TEXTURE_2D, texName[1]); glsl.ON(); GLint samplerLoc = glGetUniformLocation(glsl.ShaderProg, "sampler"); glUniform1i(samplerLoc, 0);//GL_TEXTURE0を適用 draw_obj(); glBindTexture(GL_TEXTURE_2D, texName[0]); drawFloor(10.0, 10.0); glsl.OFF(); glBindTexture(GL_TEXTURE_2D, 0); drawShadow(0); glutSwapBuffers(); } //タイマー void timer(int value){ ang += dang; if(ang >= 360.0f)ang = 0.0f; glutTimerFunc(10 , timer , 0); } int main(int argc, char *argv[]){ glutInitWindowPosition(100, 100); glutInitWindowSize(TEX_WIDTH, TEX_HEIGHT); glutInit(&argc, argv); glutInitDisplayMode(GLUT_RGBA | GLUT_DOUBLE); glutCreateWindow("オフスクリーンレンダリング"); glutDisplayFunc(display); glutIdleFunc(idle); glutMouseFunc(mouse); glutMotionFunc(motion); glutReshapeFunc(resize); glutTimerFunc(10 , timer , 0); Init(); glutMainLoop(); return 0; } </td> </tr></tbody></table>

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オフスクリーンレンダリング

「オフスクリーンレンダリング」(2014/03/01 (土) 22:49:18) の最新版変更点