一哭二鬧三上悠亞

電腦圖學2019-05-30 week15
1.主題:攝影機 運鏡
2.主題:投影 矩陣
3.複習:位置移動VS轉動
4.複習:背景貼圖
5.期末作品

下載WINDOWS GLUT32DLL DATA

透過main cpp把檔案弄到codeblocks打開 很酷

這個用到的都是之前交過的 但是還沒打光 所以看不到人長怎樣

glEnable(GL_DEPTH_TEST);<<深度偵測 很重要****

glEnable(GL_LIGHT0);

    glEnable(GL_LIGHTING);開燈光

 GLfloat light_pos[] = { 0.0, 0.0, -1.0, 0.0 };

    glLightfv(GL_LIGHT0, GL_POSITION, light_pos);燈光亮度

#include <math.h> 因為用cos sin所以math函式

float eyeX=0.5, eyeY=0, eyeZ=0; 設定初始角度

void timer(int t) 時間軸

{

    float angle = (t/180.0)*3.1415926; 角度公式

    eyeX=0.5*cos(angle);  這我也不太懂

    eyeZ=0.5*sin(angle); 

    glutTimerFunc(33, timer, t+1); 之前交的時間軸函式

    glMatrixMode(GL_MODELVIEW); 

    glLoadIdentity();

    gluLookAt( eyeX, eyeY, eyeZ,///eye ///NOW3

           0, 0, 0,///center ///NOW3

               0, 1, 0);///up    ///NOW3

lookat>>觀看

glMatrixMode(GL_PROJECTION); 開啟ortho才不會破圖
    glLoadIdentity(); ///NOW4
glOrtho(-1, +1,  -1,+1, -10,+10);
--------------------------------------------------------------------
#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=4, eyeY=0, eyeZ=0; ///NOW3
float upX=0,upY=1,upZ=0;
void timer(int t)///NOW3
{
    glutTimerFunc(33, timer, t+1);///NOW3

    float angle = (t/180.0)*3.1415926; ///NOW3
    eyeX=4*cos(angle); ///NOW3
    eyeZ=4*sin(angle); ///NOW3
    glMatrixMode(GL_PROJECTION); ///NOW4
    glLoadIdentity(); ///NOW4
gluPerspective(60.0, 1, 1.0, 256.0);///glOrtho(-1, +1,  -1,+1, -10,+10);

    glMatrixMode(GL_MODELVIEW);///NOW3
    glLoadIdentity();///NOW3
    gluLookAt( eyeX, eyeY, eyeZ,///eye ///NOW3
           0, 0, 0,///center ///NOW3
               upX, upY, upZ);///up    ///NOW3

    glutPostRedisplay();///NOW3
}
void world_reshape(int width, int height){
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    gluPerspective(60.0, 1, 1.0, 256.0);

    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();
    gluLookAt( eyeX, eyeY, eyeZ,///eye ///NOW3
           0, 0, 0,///center ///NOW3
               upX, upY, upZ);///up    ///NOW3


    glutPostRedisplay();
}

int main(int argc, char** argv)
{
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_DEPTH | GLUT_DOUBLE);
    glutInitWindowSize(512,512);
    glutInitWindowPosition(50, 50);
    glutCreateWindow("week15-06160565");
    glutReshapeFunc(world_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;
}

--------------------------------------------

world_reshape函式 當移動視窗大小 人物會維持比例 不會忽胖忽瘦

void world_reshape(int width, int height){
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    gluPerspective(60.0, 1, 1.0, 256.0);

    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();
    gluLookAt( eyeX, eyeY, eyeZ,///eye ///NOW3
           0, 0, 0,///center ///NOW3
               upX, upY, upZ);///up    ///NOW3


    glutPostRedisplay();
}

-----------------------------------------------

gluPerspective(60.0, 1, 1.0, 256.0);透視

glOrtho(-1, +1,  -1,+1, -10,+10);直視