Week 15: 攝影機 運鏡 投影 矩陣
利用滑鼠滑動 eye center讓攝影機有不同的角度
將3個檔案移至專案的裡頭
用完之後發現找不到檔案
須將data資料夾放置freeglut bin的資料夾，就有了
利用下面程式碼匯出的白色模型
程式碼:
#include <GL/glut.h>
#include "glm.h" ///for glmReadOBJ(), glmDraw(), glmUnitized()....
GLMmodel * pmodel=NULL;///NOW
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_DOUBLE | GLUT_DEPTH);
glutInitWindowSize(500,500);
glutCreateWindow("week15");
glutDisplayFunc(display);
glutMainLoop();
}
下列程式碼是模型的背後並且變彩色的了
程式碼:
#include <GL/glut.h>
#include "glm.h" ///for glmReadOBJ(), glmDraw(), glmUnitized()....
GLMmodel * pmodel=NULL;///NOW
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_DOUBLE | GLUT_DEPTH);
glutInitWindowSize(500,500);
glutCreateWindow("week15");
glutDisplayFunc(display);
GLfloat light_pos[] = { 0.0, 0.0, -1.0, 0.0 };///NOW2 打光的位置
glEnable(GL_DEPTH_TEST);///NOW2 有立體的功能
glEnable(GL_LIGHT0); ///NOW2 打光後變立體的彩色的
glEnable(GL_LIGHTING); ///NOW2 打光後變立體的彩色的
glLightfv(GL_LIGHT0, GL_POSITION, light_pos);///NOW2 打光的位置
glutMainLoop();
}
利用Timer搭配旋轉
程式碼:
#include <GL/glut.h>
#include "glm.h" ///for glmReadOBJ(), glmDraw(), glmUnitized()....
GLMmodel * pmodel=NULL;///NOW
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>
float eyeX=1, eyeY=0, eyeZ=0;
void timer(int t)///NOW3
{
glutTimerFunc(33, timer, t+1);///NOW3
float angle=t/180.0*3.1415926;///NOW3 算出一個角度
eyeX=cos(angle); eyeZ=sin(angle);///NOW3
glMatrixMode(GL_MODELVIEW);///NOW3
glLoadIdentity();///NOW3
gluLookAt(eyeX, eyeY, eyeZ, ///NOW3 LookAt的 eye
0.0, 0.8, 0.0, ///NOW3 LookAt的 center
0, 1, 0);///NOW3 LookAt的 up
glutPostRedisplay();///NOW3 Re-display
}
int main(int argc, char**argv)
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);
glutInitWindowSize(500,500);
glutCreateWindow("week15");
glutDisplayFunc(display);
glutTimerFunc(33, timer, 0);///NOW3
GLfloat light_pos[] = { 0.0, 0.0, -1.0, 0.0 };///NOW2 打光的位置
glEnable(GL_DEPTH_TEST);///NOW2 有立體的功能
glEnable(GL_LIGHT0); ///NOW2 打光後變立體的彩色的
glEnable(GL_LIGHTING); ///NOW2 打光後變立體的彩色的
glLightfv(GL_LIGHT0, GL_POSITION, light_pos);///NOW2 打光的位置
glutMainLoop();
}
這樣就能有完整的模型轉動了
程式碼:
#include <GL/glut.h>
#include "glm.h" ///for glmReadOBJ(), glmDraw(), glmUnitized()....
GLMmodel * pmodel=NULL;///NOW
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>
float eyeX=1, eyeY=0, eyeZ=0;
void timer(int t)///NOW3
{
glutTimerFunc(33, timer, t+1);///NOW3
float angle=t/180.0*3.1415926;///NOW3 算出一個角度
eyeX=cos(angle); eyeZ=sin(angle);///NOW3
glMatrixMode(GL_PROJECTION);///NOW4
glLoadIdentity();///NOW4
glOrtho(-1,+1, -1,+1, -10,+10);///NOW4 可以看到範圍比較大的投影法
glMatrixMode(GL_MODELVIEW);///NOW3
glLoadIdentity();///NOW3
gluLookAt(eyeX, eyeY, eyeZ, ///NOW3 LookAt的 eye
0.0, 0.6, 0.0, ///NOW3 LookAt的 center
0, 1, 0);///NOW3 LookAt的 up
glutPostRedisplay();///NOW3 Re-display
}
int main(int argc, char**argv)
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);
glutInitWindowSize(500,500);
glutCreateWindow("week15");
glutDisplayFunc(display);
glutTimerFunc(33, timer, 0);///NOW3
GLfloat light_pos[] = { 0.0, 0.0, 1.0, 0.0 };///NOW2 打光的位置
glEnable(GL_DEPTH_TEST);///NOW2 有立體的功能
glEnable(GL_LIGHT0); ///NOW2 打光後變立體的彩色的
glEnable(GL_LIGHTING); ///NOW2 打光後變立體的彩色的
glLightfv(GL_LIGHT0, GL_POSITION, light_pos);///NOW2 打光的位置
glutMainLoop();
}
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