#week03
#week03_mouse
0.安裝freeglut
1.10行程式
2.加3行 mouse
=> print "Hello mouse"
加上#include <stdio.h> ///for printf()
void mouse(int button, int state, int x, int y)
{
printf("Hello Mouse!\n");
}
=> print4個參數
0=右鍵 1=中鍵 2=左鍵(button)
void mouse(int button, int state, int x, int y)
{
printf("%d %d %d %d\n", button, state, x, y);
}
void mouse(int button, int state, int x, int y)
{
if(state==GLUT_DOWN)
printf("glVertex2f((%d-150)/150.0, -(%d-150)/150.0);\n", x, y);
}
*下載課本範例 =>data & win32
解壓縮後data資料夾放進window資料夾
網址: https://jsyeh.org/3dcg10
使用window=> Transformation.exe
#week03_mouse_glTranslatef
拿46/49/54行程式碼
///程式從 week03_mouse 拿來用
#include <GL/glut.h>
#include <stdio.h>
float teapotX = 0, teapotY = 0;
void mouse(int button, int state, int x, int y)
{
teapotX = (x-150)/150.0;
teapotY = -(y-150)/150.0;
}
void display()
{///偷範例的第46行glClear()、49行、54行
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
glPushMatrix(); ///第49行
glTranslatef(teapotX, teapotY, 0);///自己寫
glutSolidTeapot( 0.3 );
glPopMatrix(); ///第54行
glutSwapBuffers();
}
int main(int argc, char*argv[])
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);
glutCreateWindow("week03 mouse");
glutDisplayFunc(display);
glutMouseFunc(mouse); ///(1) 註冊mouse函式
glutMainLoop();
}
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老師筆記:
#week03_mouse_glRotatef
把week03_mouse_glTranslatef程式改 寫
新增
1.float = 0
2.glRotatef(angle, 0, 0, 1); ///對z軸轉
要看到轉動細節 => mouse motion 滑鼠動作的細節
註冊一個函式 =>glutMotionFunc(motion); ///讓motion動起來
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///程式從 week03_mouse_glTranslatef 拿來用
#include <GL/glut.h>
#include <stdio.h>
float teapotX = 0, teapotY = 0;
float angle = 0; ///新增角度
void mouse(int button, int state, int x, int y)
{
teapotX = (x-150)/150.0;
teapotY = -(y-150)/150.0;
}
void display()
{
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
glPushMatrix();
glRotatef(angle, 0, 0, 1); ///對z軸轉
glutSolidTeapot( 0.3 );
glPopMatrix();
glutSwapBuffers();
}
void motion(int x, int y)
{
angle = x;
display();
}
int main(int argc, char*argv[])
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);
glutCreateWindow("week03 mouse rotate");
glutDisplayFunc(display);
glutMouseFunc(mouse);
glutMotionFunc(motion); ///(3) motion的細節
glutMainLoop();
}
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#week03_mouse_translate_rotate
void keyboard(unsigned char key, int x, int y)
{
if(key=='e') method = 1; ///轉動
if(key=='w') method = 2; ///移動
}
然後宣告函式
glutKeyboardFunc(keyboard); ///按鍵
