Cid week14

 Step01-1

先安裝GITHUB，安裝後把上課的程式碼資料夾載下來後開新專案於資料夾內，且使用資料夾內的freeglut，

複製第二周10行程式碼

程式碼

#include <GL/glut.h>

void display()

{

    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

    glutSolidTeapot(0.3);

    glutSwapBuffers();

}

int main(int argc, char *argv[])

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("Week14");

    glutDisplayFunc(display);

    glutMainLoop();

}

讓茶壺隨時間轉動

程式碼

#include <GL/glut.h>

float angle = 0;

void timer(int t)

{

    glutTimerFunc(500, timer, t+1);

    angle += 90;

    glutPostRedisplay();

}

void display()

{

    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

        glRotatef(angle, 0, 0, 1);

        glutSolidTeapot(0.3);

    glPopMatrix();

    glutSwapBuffers();

}

int main(int argc, char *argv[])

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("Week14");

    glutTimerFunc(300, timer, 0);

    glutDisplayFunc(display);

    glutMainLoop();

}

 Step01-2

開新專案week14_timer_play，讓茶壺透過鍵盤啟動才能開始播放

程式碼

#include <GL/glut.h>

float angle = 0;

void timer(int t)

{

    glutTimerFunc(500, timer, t+1);

    angle += 90;

    glutPostRedisplay();

}

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

{

    glutTimerFunc(0, timer, 0);

}

void display()

{

    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

        glRotatef(angle, 0, 0, 1);

        glutSolidTeapot(0.3);

    glPopMatrix();

    glutSwapBuffers();

}

int main(int argc, char *argv[])

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("Week14");

    glutKeyboardFunc(keyboard);

    ///glutTimerFunc(300, timer, 0);

    glutDisplayFunc(display);

    glutMainLoop();

}

Step02-1

先用EXCEL瞭解內插

讓程式播放自己的動作

程式碼

#include <GL/glut.h>

float angle = 0,newAngle = 0,oldAngle = 0;

float oldX = 0;

void timer(int t)

{

    if(t<100) glutTimerFunc(33, timer, t+1);

    float alpha = t/100.0;

    angle = alpha*newAngle + (1-alpha)*oldAngle;

    glutPostRedisplay();

}

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

{

    glutTimerFunc(0, timer, 0);

}

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

{

    if(state==GLUT_DOWN) oldAngle = angle;

    if(state==GLUT_UP) newAngle = angle;

    oldX = x;

    glutPostRedisplay();

}

void motion(int x, int y)

{

    angle += x-oldX;

    oldX = x;

    glutPostRedisplay();

}

void display()

{

    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

        glRotatef(angle, 0, 0, 1);

        glutSolidTeapot(0.3);

    glPopMatrix();

    glutSwapBuffers();

}

int main(int argc, char *argv[])

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("Week14");

    glutMouseFunc(mouse);

    glutMotionFunc(motion);

    glutKeyboardFunc(keyboard);

    ///glutTimerFunc(300, timer, 0);

    glutDisplayFunc(display);

    glutMainLoop();

}

Step03

程式碼

讓模型的手可以自由擺動

#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};

int ID = 3;

float teapotX = 0, teapotY = 0;

float angle = 0;

FILE * fout = NULL;

FILE * fin = NULL;

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;

    glutPostRedisplay();

}

void display()

{

    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

    if(head==NULL){

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

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

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

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

    }

    glPushMatrix();

        glScalef(0.3, 0.3, 0.3);

        glPushMatrix();

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

            if(ID==0) glColor3f(1,0,0);

            else glColor3f(1,1,1);

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

        glPopMatrix();

        if(ID==1) glColor3f(1,0,0);

        else glColor3f(1,1,1);

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

        glPushMatrix();

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

            glTranslatef(-1.360000, +0.360000, 0);

            glRotatef(angle, 0, 0, 1);

            glTranslatef(1.360000, -0.360000, 0);

            if(ID==2) glColor3f(1,0,0);

            else glColor3f(1,1,1);

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

            glPushMatrix();

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

                glTranslatef(-1.959999, +0.080000, 0);

                glRotatef(angle, 0, 0, 1);

                glTranslatef(1.959999, -0.080000, 0);

                if(ID==3) glColor3f(1,0,0);

                else glColor3f(1,1,1);

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

            glPopMatrix();

        glPopMatrix();

    glPopMatrix();

    glColor3f(0,1,0);

    glutSolidTeapot( 0.02 );

    glutSwapBuffers();

}

int oldX=0, oldY=0;

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

    if(state==GLUT_DOWN){

        oldX = x;

        oldY = y;

    }

}

void motion(int x, int y) {

    teapotX += (x - oldX)/150.0*3;

    teapotY -= (y - oldY)/150.0*3;

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

    angle += x-oldX;

    oldX = x;

    oldY = y;

    glutPostRedisplay();

}

int main(int argc, char** argv)

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("week14");

    glutMotionFunc(motion);

    glutDisplayFunc(display);

    glutKeyboardFunc(keyboard);

    glutMouseFunc(mouse);

    glutMainLoop();

}