Assignment2_v1.zip_OPenGL 鍏夌収_OpenGL 光照模型_opengl_opengl 光照_openg

#include <iostream> #include <GL/glut.h> #include <cstdlib> #include <math.h> #include "assignment2.h" using namespace std; static int press_x; static int press_y; static int xform_mode = TRANSFORM_NONE; static bool bDoScale = false; static GLColor4 black = {0.f, 0.f, 0.f, 0.f}; void drawObject(bool useVertexColors) { for(unsigned int i = 0; i < oObject.faces.size(); i++) { Vertex &v1 = oObject.vertices[oObject.faces[i].v1]; Vertex &v2 = oObject.vertices[oObject.faces[i].v2]; Vertex &v3 = oObject.vertices[oObject.faces[i].v3]; glBegin(GL_TRIANGLES); { if(drawTextures == true) { glTexCoord2f(v1.t[S], v1.t[T]); } if(useVertexColors == true) { glColor3f(v1.c[R], v1.c[G], v1.c[B]); } glNormal3f(v1.n[X], v1.n[Y], v1.n[Z]); glVertex3f(v1.v[X], v1.v[Y], v1.v[Z]); if(drawTextures == true) { glTexCoord2f(v2.t[S], v2.t[T]); } if(useVertexColors == true) { glColor3f(v2.c[R], v2.c[G], v2.c[B]); } glNormal3f(v2.n[X], v2.n[Y], v2.n[Z]); glVertex3f(v2.v[X], v2.v[Y], v2.v[Z]); if(drawTextures == true) { glTexCoord2f(v3.t[S], v3.t[T]); } if(useVertexColors == true) { glColor3f(v3.c[R], v3.c[G], v3.c[B]); } glNormal3f(v3.n[X], v3.n[Y], v3.n[Z]); glVertex3f(v3.v[X], v3.v[Y], v3.v[Z]); } glEnd(); } } void drawBoundingBox(void) { glColor3f(0.0, 1.0, 0.0); glBegin(GL_LINE_LOOP); { glVertex3f(oObject.bBox.minP[X], oObject.bBox.minP[Y], oObject.bBox.minP[Z]); glVertex3f(oObject.bBox.maxP[X], oObject.bBox.minP[Y], oObject.bBox.minP[Z]); glVertex3f(oObject.bBox.maxP[X], oObject.bBox.maxP[Y], oObject.bBox.minP[Z]); glVertex3f(oObject.bBox.minP[X], oObject.bBox.maxP[Y], oObject.bBox.minP[Z]); } glEnd(); glBegin(GL_LINE_LOOP); { glVertex3f(oObject.bBox.minP[X], oObject.bBox.minP[Y], oObject.bBox.maxP[Z]); glVertex3f(oObject.bBox.maxP[X], oObject.bBox.minP[Y], oObject.bBox.maxP[Z]); glVertex3f(oObject.bBox.maxP[X], oObject.bBox.maxP[Y], oObject.bBox.maxP[Z]); glVertex3f(oObject.bBox.minP[X], oObject.bBox.maxP[Y], oObject.bBox.maxP[Z]); } glEnd(); glBegin(GL_LINES); { glVertex3f(oObject.bBox.minP[X], oObject.bBox.minP[Y], oObject.bBox.minP[Z]); glVertex3f(oObject.bBox.minP[X], oObject.bBox.minP[Y], oObject.bBox.maxP[Z]); glVertex3f(oObject.bBox.maxP[X], oObject.bBox.minP[Y], oObject.bBox.minP[Z]); glVertex3f(oObject.bBox.maxP[X], oObject.bBox.minP[Y], oObject.bBox.maxP[Z]); glVertex3f(oObject.bBox.maxP[X], oObject.bBox.maxP[Y], oObject.bBox.minP[Z]); glVertex3f(oObject.bBox.maxP[X], oObject.bBox.maxP[Y], oObject.bBox.maxP[Z]); glVertex3f(oObject.bBox.minP[X], oObject.bBox.maxP[Y], oObject.bBox.minP[Z]); glVertex3f(oObject.bBox.minP[X], oObject.bBox.maxP[Y], oObject.bBox.maxP[Z]); } glEnd(); } // drawBoundingBox void scaleToUnitBox(void) { Point maxP; Point minP; // wrong variable : minP[X] = minP[Y] = minP[Z] = -1e35; maxP[X] = maxP[Y] = maxP[Z] = -1e35; minP[X] = minP[Y] = minP[Z] = 1e35; Vector vBoxSize; Point bboxCenterP; for(unsigned int i = 0; i < oObject.vertices.size(); i++) { Vertex &v = oObject.vertices[i]; if(v.v[X] < minP[X]) minP[X] = v.v[X]; if(v.v[Y] < minP[Y]) minP[Y] = v.v[Y]; if(v.v[Z] < minP[Z]) minP[Z] = v.v[Z]; if(v.v[X] > maxP[X]) maxP[X] = v.v[X]; if(v.v[Y] > maxP[Y]) maxP[Y] = v.v[Y]; if(v.v[Z] > maxP[Z]) maxP[Z] = v.v[Z]; } subPnt(vBoxSize, maxP, minP); addScaled(bboxCenterP, minP, vBoxSize, 0.5); fprintf(stderr, "original bbox : %f %f %f -> %f %f %f\n", minP[X], minP[Y], minP[Z], maxP[X], maxP[Y], maxP[Z]); fprintf(stderr, "original bbox : %f %f %f | %f %f %f\n", bboxCenterP[X], bboxCenterP[Y], bboxCenterP[Z], vBoxSize[X], vBoxSize[Y], vBoxSize[Z]); float modelScale = 1.f / maxComponent3(vBoxSize); fprintf(stderr, "%f %f\n", maxComponent3(vBoxSize), modelScale); for(unsigned int i = 0; i < oObject.vertices.size(); i++) { Vertex &v = oObject.vertices[i]; v.v[X] = (v.v[X] - bboxCenterP[X]) * modelScale; v.v[Y] = (v.v[Y] - bboxCenterP[Y]) * modelScale; v.v[Z] = (v.v[Z] - bboxCenterP[Z]) * modelScale; } oObject.bBox.minP[X] = (minP[X] - bboxCenterP[X]) * modelScale; oObject.bBox.minP[Y] = (minP[Y] - bboxCenterP[Y]) * modelScale; oObject.bBox.minP[Z] = (minP[Z] - bboxCenterP[Z]) * modelScale; oObject.bBox.maxP[X] = (maxP[X] - bboxCenterP[X]) * modelScale; oObject.bBox.maxP[Y] = (maxP[Y] - bboxCenterP[Y]) * modelScale; oObject.bBox.maxP[Z] = (maxP[Z] - bboxCenterP[Z]) * modelScale; oObject.bBox.vSize[X] = vBoxSize[X] * modelScale; oObject.bBox.vSize[Y] = vBoxSize[Y] * modelScale; oObject.bBox.vSize[Z] = vBoxSize[Z] * modelScale; } bool readFile(const char *szFilename) { FILE *pFile; char cType; int rc; Vertex tmpVertex; Face tmpFace; int vid; int fid; tmpVertex.v[3] = 1.f; tmpVertex.n[3] = 0.f; tmpVertex.t[S] = 0.f; tmpVertex.t[T] = 0.f; tmpVertex.c[R] = 1.f; tmpVertex.c[G] = 0.f; tmpVertex.c[B] = 0.f; pFile = fopen(szFilename, "r"); if(pFile != NULL) { cType = fgetc(pFile); while(cType != EOF) { switch(cType) { case 'V' : { rc = fscanf(pFile, "ertex %d %f %f %f {normal=(%f %f %f)}\n", &vid, &tmpVertex.v[X], &tmpVertex.v[Y], &tmpVertex.v[Z], &tmpVertex.n[X], &tmpVertex.n[Y], &tmpVertex.n[Z]); if(rc == 7) { oObject.vertices.push_back(tmpVertex); } break; } case 'F' : { rc = fscanf(pFile, "ace %d %d %d %d\n", &fid, &tmpFace.v1, &tmpFace.v2, &tmpFace.v3); if(rc == 4) { //store this face --tmpFace.v1; --tmpFace.v2; --tmpFace.v3; oObject.faces.push_back(tmpFace); } } break; case '#' : //this is a comment { do //read till end of the line { cType = fgetc(pFile); } while(cType != EOF && cType != '\n');