(1)攝影機和運鏡
三個模式
分別是glOrtho
glFustum
gluPerspective
今天主要用gluPerspective
來達成主要目的
eye眼睛看的方向
center看的中心點
up手拿鏡頭的角度
接著來跑CodeBlocks
先到這個網站
http://www.cmlab.csie.ntu.edu.tw/~jsyeh/3dcg10/?fbclid=IwAR28YojTgynOCT1AFY77S_10lyrz1DW1syRtZXDZyMUCvSZygUNGR2ms4Yc
下載source裡面有glm.c和glm.h
然後把他們放到你的資料夾,還有要把glm.c改名為glm.cpp
還要下載data
放到你資料夾的bin資料夾
用Notepad++打開source裡的Prejection.c
把Prejection.c的程式碼複製貼上到自己專案的main理
(2)投影、矩陣
先把人形弄上去
#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;
}
#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;
}
(3)位置移動 & 轉動
#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;
}
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