電腦圖學紀錄

week15-1

直接用glut預設的程式碼去改

week15-2 step1

#include <GL/glut.h>
void display()
{
    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
    glutSolidTeapot(0.3);
    glutSwapBuffers();
}
void reshape(int w, int h)
{
    glViewport(0,0,w,h);
    float ar= w/ (float) h;
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    gluPerspective(60, ar, 0.01, 1000);
    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();
    gluLookAt(0,0,1,  0,0,0,  0,1,0);
    glutPostRedisplay();
}
int main(int argc, char *argv[])
{
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);
    glutCreateWindow("week15");
    glutDisplayFunc(display);
    glutReshapeFunc(reshape);
    glutMainLoop();
}

茶壺會跟著視窗一起縮放

week15-2 step2

#include <GL/glut.h>
void display()
{
    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
    glutSolidTeapot(0.3);
    glutSwapBuffers();
}
void reshape(int w, int h)
{
    glViewport(0,0,w,h);
    float ar= w/ (float) h;
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    gluPerspective(60, ar, 0.01, 1000);
    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();
    gluLookAt(0,0,1,  0,0,0,  0,1,0);
    glutPostRedisplay();
}
float eyeX=0, eyeY=0;
void motion(int x, int y){
    eyeX= (x-150.0)/150.0;
    eyeY= (150.0-y)/150.0;
    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();
    gluLookAt(eyeX, eyeY, 1, 0,0,0, 0,1,0);
    glutPostRedisplay();
}
int main(int argc, char *argv[])
{
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);
    glutCreateWindow("week15");

    glutMotionFunc(motion);
    glutDisplayFunc(display);
    glutReshapeFunc(reshape);
    glutMainLoop();
}

可以各角度轉動

#include <stdio.h>

#include <GL/glut.h>

#include "glm.h"

GLMmodel * head = NULL;

GLMmodel * body = NULL;

GLMmodel * uparmR = NULL;

GLMmodel * lowarmR = NULL;

int show[4]={1,1,1,1};///用show[i]決定要不要顯示

int ID=3;///0:頭 1:身體 2:上手臂 3:下手臂

FILE * fout = NULL; ///一開始,檔案沒有開, NULL

FILE * fin = NULL; ///要讀檔用的指標, 一開始也是 NULL

float teapotX=0, teapotY=0;

///float angle=0, angle2=0, angle3=0;

float angle[20]={};///變陣列

void keyboard (unsigned char key, int x, int y){

    if (key=='0') ID = 0;

    if (key=='1') ID = 1;

    if (key=='2') ID = 2;

    if (key=='3') ID = 3;

    if(key=='s'){

        printf("hello world\n");

        if(fout==NULL) fout = fopen("motion.txt", "w");

        for (int i=0; i<20; i++){

            fprintf(fout, "%.2f ", angle[i] );///寫檔案

        }

        fprintf(fout, "\n");

    }else if(key=='r'){

        if(fin==NULL) fin =fopen("motion.txt", "r");

        for(int i=0; i<20; i++){

            fscanf(fin, "%f", &angle[i] );

        }

        glutPostRedisplay();

    }

    glutPostRedisplay();

}

void display()

{

    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

        glScalef(0.2, 0.2, 0.2);///week13-02-2

        if(body==NULL){

            head=glmReadOBJ("model/head.obj");

            body=glmReadOBJ("model/body.obj");

            uparmR=glmReadOBJ("model/uparmR.obj");

            lowarmR=glmReadOBJ("model/lowarmR.obj");

            ///glmUnitize(body);///week13-02-1這行之後會改

        }

        if(ID==0) glColor3f(1,0,0);///選定的，設紅色

        else glColor3f(1,1,1);

        if (show[0]) glmDraw(head, GLM_MATERIAL);

        if(ID==1) glColor3f(1,0,0);///選定的，設紅色

        else glColor3f(1,1,1);

        if (show[1]) glmDraw(body, GLM_MATERIAL);

        glPushMatrix();

            glTranslatef(-1.200000, +0.453333, 0);

            glRotatef(angle[2], 0, 0, 1);///改用陣列

            ///glTranslatef(teapotX, teapotY, 0);

            glTranslatef(1.200000, -0.453333, 0);

            if(ID==2) glColor3f(1,0,0);///選定的，設紅色

            else glColor3f(1,1,1);

            if (show[2]) glmDraw(uparmR, GLM_MATERIAL);

            glPushMatrix();

                glTranslatef(-1.946666, +0.180001, 0);

                //glTranslatef(teapotX, teapotY, 0);

                glRotatef(angle[3], 0, 0, 1);///改用陣列

                glTranslatef(1.946666, -0.180001, 0);

                if(ID==3) glColor3f(1,0,0);///選定的，設紅色

                else glColor3f(1,1,1);

                if (show[3]) glmDraw(lowarmR, GLM_MATERIAL);

            glPopMatrix();

        glPopMatrix();

    glPopMatrix();

    glColor3f(0,1,0);///放小茶壺在中心點當參考

    glutSolidTeapot(0.02);///放小茶壺在中心點當參考

    glutSwapBuffers();

}

int oldX=0, oldY=0;///week13-03-2

void motion(int x, int y){

    teapotX += (x -oldX)/150.0;

    teapotY -= (y -oldY)/150.0;

    angle[ID]+=(x-oldX);

    oldX=x;

    oldY=y;

    ///angle = x;

    printf("glTranslatef(%f, %f, 0);\n",teapotX,teapotY);

    glutPostRedisplay();

}

void mouse(int button, int state, int x, int y)

{

    if(state==GLUT_DOWN){

        teapotX = (x-150)/150.0;///teapotX = (x-150)/150.0;

        teapotY = (150-y)/150.0;///teapotY = (150-y)/150.0;

        ///angle = x;

        //if(fout==NULL) fout = fopen("file4.txt", "w"); ///step02-2 沒開檔,就開

        //fprintf(fout, "%f %f\n", teapotX, teapotY); ///step02-2 要再存座標

    }

    display();

}

///void keyboard(unsigned char key, int x, int y) ///step02-2 keyboard函式

///{

    ///if(fin==NULL){ ///step02-2 如果檔案還沒 fopen(), 就開它

        ///fclose(fout); ///前面mouse會開fout指標, 所以要關掉

        ///fin = fopen("file4.txt", "r"); ///step02-2 沒開檔,就開

   /// }

    ///fscanf(fin, "%f %f", &teapotX, &teapotY); ///step02-2 真的讀檔

    ///display(); ///step02-2 重畫畫面

///}

int main(int argc, char** argv)

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("week14");

    glutDisplayFunc(display);

    glutMouseFunc(mouse);

    glutMotionFunc(motion);

    glutKeyboardFunc(keyboard); ///step02-2 keyboard要做事囉(開檔、讀檔)

    glutMainLoop();

}

按s存檔每個動作到motion 按r動起來