啵咕咕的圖學筆記 week03

 Week03 1-1進到https://jsyeh.org/3dcg10，下載data、win32       

再將windows.zip、data.zip解壓縮 1-2將data放到windows裡面，執行Transformation.exe，試試看換模型及調整下方

上週程式新增

void display()

{

    glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );

    glPushMatrix(); 備份矩陣 移動會累積，因為會修改矩陣

    glTranslated(0.5,0.5,0); 右上角

    glColor3f(1,1,0);

    glutSolidTeapot(0.3);

    glPopMatrix();還原矩陣(舊的位置)

    glutSwapBuffers();

}

進階:

#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 );

    myteapot(0.5,0.5);

    myteapot(0.5,-0.5);

    myteapot(-0.5,0.5);

    myteapot(-0.5,-0.5);

    glutSwapBuffers();

}

int main(int argc, char** argv)

{

    glutInit( &argc, argv);

    glutInitDisplayMode( GLUT_DOUBLE | GLUT_DEPTH );

    glutCreateWindow("week03 移動");

    glutDisplayFunc(display);

    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); 座標換算

    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 ²¾°Ê");

    glutDisplayFunc(display);

    glutMouseFunc(mouse);

    glutMainLoop() ;

    }