2019年5月30日 星期四

林芷祺的筆記Week15

WEEK15    2019/5/30



主題 : 攝影機、運鏡

 主題 : 投影、矩陣

開啟範例
2.下載source，data，win32，glut32.dll (4個檔案)

 3.把window解壓縮

4.data的資料夾移至window

 5.glut32.dll也移至window

6.把Projection.exe打開
 (下面右鍵切換投影方式:O是垂直投影;P是透視投影/右上右鍵切換物體)

註: gluLookAt:
eye是移動相機位置/center是鎖定某個部位(eye會有一條線射向center)/up是相機角度

GLUT專案

7.開啟glut專案(檔案位置記得存!!!!!!!!)

 8.搜尋freeglut window下載Download freeglut 3.0.0 for MinGW 

9.複製檔案位置 

 10.複製libfreeglut.a--->改成libglut32.a


11.將window裡的DATA複製到freeglut裡的bin

12.將SOURCE開啟，glm.c改成glm.cpp

13.將SOURCE裡的glm.h/glm.cpp/projection加到專案的資料夾裡 

14.將projection裡的程式碼丟到main裡面(main本身的程式要刪掉) ，將glm.cpp丟到專案裡

15.執行(開起別人的專案)

16.將程式碼改掉，執行

#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 06160531");

//    glutReshapeFunc(reshape);
    glutDisplayFunc(display);

    glutMainLoop();

    return 0;
}

17.將程式碼改掉，執行(打光，光還不對)
#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 06160531");

//    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;
}

18.將1.0改成-1.0 光 就出來了~

   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);


19.將程式碼改掉，可以運鏡了(角度不對)
#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=0.5, eyeY=0, eyeZ=0; ///NOW3
void timer(int t)///NOW3
{
    float angle = (t/180.0)*3.1415926; ///NOW3
    eyeX=0.5*cos(angle); ///NOW3
    eyeZ=0.5*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 06160531");
//    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;
}

20.將程式碼加上三行(NOW4)，調好眼睛

#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=0.5, eyeY=0, eyeZ=0; ///NOW3
void timer(int t)///NOW3
{

    glMatrixMode(GL_PROJECTION); ///NOW4
    glLoadIdentity(); ///NOW4
glOrtho(-1, +1,  -1,+1, -10,+10); ///NOW4 你可以看到 -10...+10範圍


    float angle = (t/180.0)*3.1415926; ///NOW3
    eyeX=0.5*cos(angle); ///NOW3
    eyeZ=0.5*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 06160531");
//    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;
}

21.把程式碼改掉(變透視投影)

#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 06160531");
//    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;
}




複習: 位置移動、轉動

複習: 背景貼圖



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