2023年5月17日 星期三

旻_Week14

 電腦圖學 2023-05-17 Week14

1. 主題: 切換關節
2. 主題: 切換移動、旋轉
3. 主題: 計時器、內插動作



安裝Git GitBash


-cd desktop
-git clone https://github.com/Owoyayou/2023graphicsa
-cd 2023graphicsa
-start .



GLUT專案

先把freeglut丟到桌面設定好

程式:timer
freeglut再裝一次
glutTimerFunc
CodeBlocks:File - New - Project

Week14-1_timer


#include <GL/glut.h>
float angle=0;
void display(){
    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
    glPushMatrix();
        glRotatef(angle,0,0,1);
        glutSolidTeapot(0.3);
    glPopMatrix();
    glutSwapBuffers();
}
void timer(int t){///timer函式 做對應動作
    glutTimerFunc(500,timer,t+1);///設定下一個鬧鐘
    angle += 90;///增加90度
    glutPostRedisplay();///重畫畫面
}
int main(int argc, char *argv[])
{
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
    glutCreateWindow("week14");

    glutDisplayFunc(display);
    glutTimerFunc(2000,timer,0)///step1設定timer函式

    glutMainLoop();

}

循環轉90度

Week14-2_timer_play
///用鍵盤播放
#include <GL/glut.h>
float angle=0;
void display(){
    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
    glPushMatrix();
        glRotatef(angle,0,0,1);
        glutSolidTeapot(0.3);
    glPopMatrix();
    glutSwapBuffers();
}
void timer(int t) ///timer函式 做對應動作
{
    glutTimerFunc(500,timer,t+1);///設定下一個鬧鐘
    angle += 90;///增加90度
    glutPostRedisplay();///重畫畫面
}
void keyboard(unsigned char key,int x,int y)
{
    glutTimerFunc(0,timer,0);
}
int main(int argc, char *argv[])
{
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
    glutCreateWindow("week14");

    glutDisplayFunc(display);
    glutKeyboardFunc(keyboard);///step1-2
    ///glutTimerFunc(2000,timer,0)///step1設定timer函式

    glutMainLoop();
}
按一下鍵盤就會開始一直旋轉90度

增加mouse()負責處理按下去、放開對應動作
motion()負責即時更新角度
timer()裡想要用100格的內插，所以t小於100十持續設定下一次timer
用alpha算出角度值

///week14-3_timer_alpha_interpolation
#include <GL/glut.h>
float angle=0,oldAngle=0,newAngle=0;///宣告變數
void display()
{
    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
    glPushMatrix();
        glRotatef(angle,0,0,1);
        glutSolidTeapot(0.3);
    glPopMatrix();
    glutSwapBuffers();
}
void timer(int t) ///timer函式 做對應動作
{
    if(t<100)glutTimerFunc(50,timer,t+1);///在100之內，設定下一個鬧鐘
    float alpha = t/100.0;///alpha介於0.00~1.00之間
    angle += 90;///增加90度
    glutPostRedisplay();///重畫畫面
}
void motion(int x,int y)
{
    angle=0;
    glutPostRedisplay();
}
void mouse(int button,int state,int x,int y)
{
    if(state==GLUT_DOWN) oldAngle=x;///按下去
    if(state==GLUT_UP) newAngle=x;///放開來
    glutPostRedisplay();
}
void keyboard(unsigned char key,int x,int y)
{
    glutTimerFunc(0,timer,0);
}
int main(int argc, char *argv[])
{
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
    glutCreateWindow("week14");

    glutDisplayFunc(display);
    glutMouseFunc(mouse);///按下去表示起點
    glutMotionFunc(motion);///當mouse在motion時，即時更新畫面
    glutKeyboardFunc(keyboard);

    glutMainLoop();
}
回到Final_Project > 使用CodeBlocks開啟Final_Project.cbp
更新內容
int show[4]={1,1,1,1};
int ID=0;///0:頭 1:身體 2:上手臂 3:下手臂

 if(ID==0) glColor3f(1,0,0);///選定 設紅色
        else glColor3f(1,1,1);///沒選定 設白色

///week12_5_TRT_keyboard
#include <stdio.h>
#include <GL/glut.h>
#include "glm.h"

GLMmodel * head = NULL;
GLMmodel * body = NULL;
GLMmodel * uparmR = NULL;///這邊改成我自己的檔案名稱，回家用
GLMmodel * lowarmR = NULL;///++
int show[4]={1,1,1,1};
int ID=0;///0:頭 1:身體 2:上手臂 3:下手臂 ///week14
void keyboard(){
    if(key=='0') ID=0; //show[0]=!show[0];
    if(key=='1') ID=1; //show[1]=!show[1];
    if(key=='2') ID=2; //show[2]=!show[2];
    if(key=='3') ID=3; //show[3]=!show[3];

    glutPostRedisplay();
}

FILE*fout=NULL;
FILE*fin=NULL;
float teapotX=0,teapotY=0;
float angle=0,angle2=0,angle3=0;
void display()
{
    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
    glPushMatrix();
        glScalef(0.2,0.2,0.2);///week13
        if(body==NULL){
            head=glmReadOBJ("model/head.obj");
            body=glmReadOBJ("model/body.obj");
            uparmR=glmReadOBJ("model/uparmR.obj");
            lowarmR=glmReadOBJ("model/lowarmR.obj");
        }
        if(ID==0) glColor3f(1,0,0);///選定 設紅色
        else glColor3f(1,1,1);///沒選定 設白色
        if(show[0]) glmDraw(head,GLM_MATERIAL);

        if(ID==1) glColor3f(1,0,0);///選定 設紅色
        else glColor3f(1,1,1);///沒選定 設白色
        if(show[1]) glmDraw(body,GLM_MATERIAL);

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

            if(ID==2) glColor3f(1,0,0);///選定 設紅色
            else glColor3f(1,1,1);///沒選定 設白色
            if(show[2])glmDraw(uparmR,GLM_MATERIAL);
        glPopMatrix();

        if(ID==3) glColor3f(1,0,0);///選定 設紅色
        else glColor3f(1,1,1);///沒選定 設白色
        if(show[3]) glmDraw(lowarmR,GLM_MATERIAL);
    glPopMatrix();
    glutSwapBuffers();
}

int oldX=0,oldY=0;
void motion(int x,int y){
    teapotX+=(x-oldX)/150.0;
    teapotY+=(x-oldY)/150.0;
    oldX=x;
    oldY=y;
    printf("glTranslatef(%f,%f,0);\n",teapotX,teapotY);
    glutPostRedisplay();
    oldX=x;
    oldY=y;
    anlge=x;;
    display();
}
void mouse(int button,int state,int x,int y){
    if(state==GLUT_DOWN){
        teapotX=(x-150)/150.0;
        teapotY=(150-y)/150.0;
        if(fout==NULL)fout=fopen("file4.txt","w");
        fprintf(fout,"%f %f\n",teapotX,teapotY);
    }
    display();
}
//全選 > Edit > Comment
//void keyboard(unsigned char key,int x,int y){///step2-2 keyboard函式
//    if(fin==NULL){///step2-2 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");///step2-2 沒開檔,就開
//    }
//    fscanf(fin,"%f %f",&teapotX,&teapotY);///step2-2 真的讀檔
//    display();///step2-2 重畫畫面
//}


int main(int argc,char**argv){

    glutInit(&argc,argv);
    glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);
    glutCreateWindow("week12");

    glutDisplayFunc(display);
    glutMouseFunc(mouse);
    glutMouseFunc(motion);///week13
    glutKeyboardFunc(keyboard);

    glutMainLoop();
}


按0123分別可以顯示出不同部位

#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
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();
}
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;
void display()
{
    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
    glPushMatrix();
        glScalef(0.2, 0.2, 0.2);///week13-2-2
        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);///week13-2-1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, 0, 0, 1);
            ///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, 0, 0, 1);
            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;
    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"); ///step2-2 沒開檔,就開
        fprintf(fout, "%f %f\n", teapotX, teapotY); ///step2-2 要再存座標
    }
    display();
}
///void keyboard(unsigned char key, int x, int y) ///step02-2 keyboard函式
///{
    ///if(fin==NULL){ ///step2-2 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"); ///step2-2 沒開檔,就開
   /// }
    ///fscanf(fin, "%f %f", &teapotX, &teapotY); ///step2-2 讀檔
    ///display(); ///step2-2 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); ///step2-2 (開檔、讀檔)

    glutMainLoop();
}

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