W15同是腰間盤就你最突出

Week15 課堂重點

主題：投影矩陣、攝影機與運鏡

I 投影範例

1、今天依舊是從老師的網站(3D Graphics) 

下載檔案開始↓

2、解壓縮檔案C:\Users\user\Downloads\windows\data

如圖

3、點開Windows資料夾裡的Projection

II 實作

1、下載Freeglut windows檔案解壓縮

打開project的libglut32.a檔

2、到網站(3D Graphics)下載source檔



解壓縮圖中檔案到code block開的專案資料夾



3、回到libglut32.a檔加入檔案如圖



選擇glm.cpp檔



4、清除libglut32.a中的程式

複製projection.c的程式碼放進main.cpp





5、把在3D Graphics 下載的data放進freeglut的bin資料夾中就OK了

III 實作

1、刪減程式碼如圖

#include <GL/glut.h>///GLUT 外掛 #include "glm.h"///glm.cpp for 3D model glmReadOBJ(), glmDraw(), glmUnitized() GLMmodel * pmodel=NULL;///指標 void drawmodel(void) { if (!pmodel) { pmodel = glmReadOBJ("data/al.obj"); if (!pmodel) exit(0); glmUnitize(pmodel); glmFacetNormals(pmodel); glmVertexNormals(pmodel, 90.0); } glmDraw(pmodel, GLM_SMOOTH | GLM_MATERIAL); } void display(void) { glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); drawmodel(); glutSwapBuffers(); } int main(int argc, char** argv) { glutInit(&argc, argv); glutInitDisplayMode(GLUT_DEPTH | GLUT_DOUBLE); glutInitWindowSize(512,512); glutInitWindowPosition(50, 50); glutCreateWindow("week15"); // glutReshapeFunc(reshape); glutDisplayFunc(display); glutMainLoop(); return 0; }

2、還沒打光的成果



3、加上打光程式

#include <GL/glut.h>///GLUT 外掛 #include "glm.h"///glm.cpp for 3D model glmReadOBJ(), glmDraw(), glmUnitized() GLMmodel * pmodel=NULL;///指標 void drawmodel(void) { if (!pmodel) { pmodel = glmReadOBJ("data/al.obj"); if (!pmodel) exit(0); glmUnitize(pmodel); glmFacetNormals(pmodel); glmVertexNormals(pmodel, 90.0); } glmDraw(pmodel, GLM_SMOOTH | GLM_MATERIAL); } void display(void) { glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); drawmodel(); glutSwapBuffers(); } int main(int argc, char** argv) { glutInit(&argc, argv); glutInitDisplayMode(GLUT_DEPTH | GLUT_DOUBLE); glutInitWindowSize(512,512); glutInitWindowPosition(50, 50); glutCreateWindow("week15"); // glutReshapeFunc(reshape); glutDisplayFunc(display); GLfloat light_pos[] = { 0.0, 0.0, 1.0, 0.0 }; glEnable(GL_DEPTH_TEST); glEnable(GL_LIGHTING); glEnable(GL_LIGHT0); glLightfv(GL_LIGHT0, GL_POSITION, light_pos); glutMainLoop(); return 0; }

投影幕設置問題還看不清楚



4、調整投影大小

#include <GL/glut.h>///GLUT 外掛 #include "glm.h"///glm.cpp for 3D model glmReadOBJ(), glmDraw(), glmUnitized() GLMmodel * pmodel=NULL;///指標 void drawmodel(void) { if (!pmodel) { pmodel = glmReadOBJ("data/al.obj"); if (!pmodel) exit(0); glmUnitize(pmodel); glmFacetNormals(pmodel); glmVertexNormals(pmodel, 90.0); } glmDraw(pmodel, GLM_SMOOTH | GLM_MATERIAL); } void display(void) { glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); drawmodel(); glutSwapBuffers(); } #include <math.h>///for sin() cos() ///NOW3 float eyeX=2, eyeY=0, eyeZ=0; ///NOW3 void timer(int t)///NOW3 { glMatrixMode(GL_PROJECTION); ///NOW4 glLoadIdentity(); ///NOW4 ///glOrtho(-1, +1, -1,+1, -10.0,10.0); ///NOW4 你可以看到 -10...+10範圍 gluPerspective(60, 1.0, 0.001, 1000);///NOW5 float angle = (t/180.0)*3.1415926; ///NOW3 eyeX=2*cos(angle); ///NOW3 eyeZ=2*sin(angle); ///NOW3 glutTimerFunc(33, timer, t+1);///NOW3 glMatrixMode(GL_MODELVIEW);///NOW3 glLoadIdentity();///NOW3 gluLookAt( eyeX, eyeY, eyeZ,///eye ///NOW3 0, 0, 0,///center ///NOW3 0, 1, 0);///up ///NOW3 glutPostRedisplay();///NOW3 } int main(int argc, char** argv) { glutInit(&argc, argv); glutInitDisplayMode(GLUT_DEPTH | GLUT_DOUBLE); glutInitWindowSize(512,512); glutInitWindowPosition(50, 50); glutCreateWindow("week15"); // glutReshapeFunc(reshape); glutDisplayFunc(display); glutTimerFunc(33, timer, 0);///NOW3 GLfloat light_pos[] = { 0.0, 0.0, 1.0, 0.0 }; glEnable(GL_DEPTH_TEST); glEnable(GL_LIGHTING); glEnable(GL_LIGHT0); glLightfv(GL_LIGHT0, GL_POSITION, light_pos); glutMainLoop(); return 0; }