(2)貼圖+背景
(3)模型+貼圖
(4)檔案
課堂作業(一)基本
#include <stdio.h>
FILE *fout=NULL, *fin=NULL;
int main(int argc,char** argv)
{
if(fout==NULL)fout=fopen("output.txt","w+");///開啟檔案,可寫入資料
fprintf(fout,"HelloWorld");///寫入資料
}
課堂作業(二)mouse motion紀錄
#include <GL/glut.h>
#include <stdio.h>
FILE *fout=NULL, *fin=NULL;
void display()
{
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
glutSolidTeapot(0.3);
glutSwapBuffers();
}
void motion(int x,int y)
{
if(fout==NULL)fout=fopen("output.txt","w+");
fprintf(fout,"%d %d\n",x,y); ///紀錄滑鼠xy軸的位置
}
int main(int argc,char** argv)
{
glutInit(&argc,argv);
glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);
glutCreateWindow("3D");
glutDisplayFunc(display);
glutMotionFunc(motion);
glutMainLoop();
}
Search Directory目錄 加 C:\Users\USER\Desktop\freeglut\include
Linker 加 C:\Users\USER\Desktop\freeglut\lib
加咒語freeglut / opengl32 / glu32 / gdi32 / winmm
加咒語freeglut / opengl32 / glu32 / gdi32 / winmm
freeglut.dll檔要記得放到資料中
在小視窗中按下滑鼠移動,關閉式窗即可在txt檔中看見資料
課堂作業(三)讀檔 按鍵
#include <GL/glut.h>
#include <stdio.h>
int nowX=150,nowY=150;///等下讀檔 把mouse motion讀回來
FILE *fout=NULL, *fin=NULL;///檔案的指標
void display()
{
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
glPushMatrix();
glTranslatef((nowX-150)/150.0,-(nowY-150)/150.0,0);
///視窗300*300,所以一半150,減掉150,就變在-150~+150
///再除以150.0,就會變成介於-1~+1間的float數
glutSolidTeapot(0.3);
glPopMatrix();
glutSwapBuffers();
}
void motion(int x,int y)
{
if(fout==NULL)fout=fopen("output.txt","w+");
fprintf(fout,"%d %d\n",x,y); ///紀錄滑鼠xy軸的位置
}
void keyboard(unsigned char key,int x,int y)
{
if(key=='d'){///按一次讀一行(一組x y)
if(fin==NULL)fin=fopen("output.txt","r");///r是讀取檔案
fscanf(fin,"%d %d",&nowX,&nowY);
}
glutPostRedisplay();///電腦貼圖post-It便利貼,告訴glut有空要重畫畫面
}
int main(int argc,char** argv)
{
glutInit(&argc,argv);
glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);
glutCreateWindow("3D");
glutDisplayFunc(display);
glutMotionFunc(motion);
glutKeyboardFunc(keyboard);
glutMainLoop();
}
課堂作業(四)理解關節轉動
#include <GL/glut.h>#include <stdio.h>
float rot[10]={0};
int rotNow=0, oldX=0, oldY=0;;
void display()
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glPushMatrix();
glPushMatrix();
glutWireCube(0.3);///body
glPushMatrix();
glTranslatef(0,0.2,0);
glutWireCube(0.1);///head
glPopMatrix();
glPushMatrix();
glTranslatef(0.15,0.1,0);
glRotatef(rot[0],0,0,1);
glTranslatef(0.05,0,0);
glutWireCube(0.1);///upper arm
glTranslatef(0.05,0,0);
glRotatef(rot[1],0,0,1);
glTranslatef(0.05,0,0);
glutWireCube(0.1);///lower arm
glTranslatef(0.05,0,0);
glRotatef(rot[2],0,0,1);
glTranslatef(0.05,0,0);
glutWireCube(0.1);///right arm
glPopMatrix();
glPushMatrix();
///glTranslatef(-0.2,0.1,0);
glTranslatef(-0.15,0.1,0);
glRotatef(-rot[3],0,0,1);
glTranslatef(-0.05,0,0);
glutWireCube(0.1);///upper arm
glTranslatef(-0.05,0,0);
glRotatef(-rot[4],0,0,1);
glTranslatef(-0.05,0,0);
glutWireCube(0.1);///lower arm
glTranslatef(-0.05,0,0);
glRotatef(-rot[5],0,0,1);
glTranslatef(-0.05,0,0);
glutWireCube(0.1);///right hand
glPopMatrix();
glPopMatrix();
glPopMatrix();
glutSwapBuffers();
}
FILE *fout=0, *fin=0;
void keyboard(unsigned char key, int x, int y)
{
if(key=='0') rotNow=0;
if(key=='1') rotNow=1;
if(key=='2') rotNow=2;
if(key=='3') rotNow=3;
if(key=='4') rotNow=4;
if(key=='5') rotNow=5;
if(key=='r'){///按小寫的r 會去讀1行/一組x,y
if(fin==NULL) fin=fopen("motion.txt", "r");
for(int i=0;i<6;i++){
fscanf(fin, "%f", &rot[i]);
}
}
glutPostRedisplay();///電腦貼個Post-It便利貼,告訴GLUT有空要重畫畫面哦
}
void motion(int x, int y)
{
rot[rotNow] += x-oldX;
oldX = x;
glutPostRedisplay();
if(fout==NULL) fout=fopen("motion.txt", "w+");
for(int i=0;i<6;i++){
fprintf(fout, "%3.1f ", rot[i]);
printf("%3.1f ", rot[i]);
}
fprintf(fout, "\n");
printf("\n");
}
void mouse(int button, int state, int x, int y)
{///先開冰箱門(滑鼠按下去),把大象塞進去(滑鼠drag),最後再關上冰箱門(起來)
if(state==GLUT_DOWN){
oldX=x; oldY=y;
}
}
int main(int argc,char**argv)
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);
glutCreateWindow("Robot");
glutDisplayFunc(display);
glutMotionFunc(motion);
glutKeyboardFunc(keyboard);
glutMouseFunc(mouse);
glutMainLoop();
}
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