AAA的電腦圖學筆記

 移動 Translate、座標換算 

1.範例 https://jsyeh.org/3dcg10/

1.1 下載 data, win32

windows.zip => 下載\windows\Transformation.exe

data.zip => 下載\windows\data\模型.obj

1.2.執行 Transformation.exe

(右上角) 右鍵:換模型

(下方)拖曳綠色的數值:

 

glTranslatef(x,y,z);

#include <GL/glut.h>

void myTeapot(float x ,float y)

{

    glPushMatrix();

    glTranslatef(x,y,0);

    glColor3f(1,1,0);

    glutSolidTeapot(0.3);

    glPopMatrix();

}

void display()

{

glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

glPushMatrix();

glTranslatef(0.5, 0.5, 0);

glColor3f(1,1,0);

glutSolidTeapot(0.3);

glPopMatrix();

glutSwapBuffers();

}

int main(int argc, char** argv)

{

glutInit(&argc,argv);

glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH)

glutCreateWindow("week03 ²¾°Ê");

glutDisplayFunc(display);

glutMainLoop();

}

滑鼠事件 glutMouseFunc()

滑鼠可以寫程式

#include <GL/glut.h>

float mouseX=0, mouseY=0;

void myTeapot(float x ,float y)

{

    glPushMatrix();

    glTranslatef(x,y,0);

    glColor3f(1,1,0);

    glutSolidTeapot(0.3);

    glPopMatrix();

}

void display()

{

    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

    myTeapot((mouseX-150)/150.0,-(mouseY-150)/150.0);

    glutSwapBuffers()

}

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

{

    mouseX=x;mouseY=y;

}

void display()

{

glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

glPushMatrix();

glTranslatef(0.5, 0.5, 0);

glColor3f(1,1,0);

glutSolidTeapot(0.3);

glPopMatrix();

glutSwapBuffers();

}

int main(int argc, char** argv)

{

glutInit(&argc,argv);

glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH)

glutCreateWindow("week03 移動");

glutDisplayFunc(display);

glutMouseFunc(mouse);

glutMainLoop();

}

用滑鼠寫程式

#include <GL/glut.h>

#include <stdio.h>

float mouseX=0, mouseY=0;

void myTeapot(float x ,float y)

{

    glPushMatrix();

    glTranslatef(x,y,0);

    glColor3f(1,1,0);

    glutSolidTeapot(0.1);

    glPopMatrix();

}

void display()

{

    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

    myTeapot((mouseX-150)/150.0,-(mouseY-150)/150.0);

    glutSwapBuffers();

}

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

{

    printf("%d %d %d %d\n",button,state,x,y);

    mouseX=x;mouseY=y;

}

int main(int argc, char** argv)

{

glutInit(&argc,argv);

glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH)

glutCreateWindow("week03 移動");

glutDisplayFunc(display);

glutMouseFunc(mouse);

glutMainLoop();

}