Week 04 一權的上課筆記

1.下載 [data] [win32] [gult32.dll] 壓縮檔並進行解壓縮到桌面。
2.把 [window] 檔案開啟並合併[data] [gult32.dll] 檔案到裡面。.

3.開啟GLUT專案，輸入上周的程式碼，新增:glTranlatef(0,0,0);，使茶壺可以改變座標位置

4.新增motion程式碼，滑鼠拖曳可移動茶壺

程式碼:#include <GL/glut.h>

float mouseX=0, mouseY=0;///x、y座標數值設定

void display()

{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

        glTranslatef(mouseX,mouseY,0);

        glutSolidTeapot(0.3);

    glPopMatrix();

    glutSwapBuffers();

}

void motion(int x, int y)

{

    mouseX = (x-150)/150.0;///滑鼠座標修正

    mouseY = -(y-150)/150.0;

    glutPostRedisplay();

}

int main(int argc, char**argv)

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("04160585's model");

    glutMotionFunc(motion);

    glutDisplayFunc(display);

    glutMainLoop();

}

5.拖曳滑鼠可使茶壺放大縮小

程式碼:

#include <GL/glut.h>

float mouseX=0, mouseY=0;

void display()

{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

        glScalef(mouseX,mouseY,0);

        glutSolidTeapot(0.3);

    glPopMatrix();

    glutSwapBuffers();

}

void motion(int x, int y)

{

    mouseX = (x-150)/150.0;/// x/300.0

    mouseY = -(y-150)/150.0;/// y/300.0

    glutPostRedisplay();///貼個便利貼 Post便利貼，告訴GLUT

    ///要重畫畫面 Re-display

}

int main(int argc, char**argv)

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("04162664 Translate Rotate Scale");

    glutDisplayFunc(display);

    glutMotionFunc(motion);

    glutMainLoop();

}