week02 電腦圖學筆記 (◍˃̶ᗜ˂̶◍)ﾉ"

 
茶壺篇💬💬1. 照之前一樣的步驟開啟openGL跟Glut

2.更改程式碼 

3. GLclear 清背景 / GlutTeapot 茶壺 / GlutCreateWindow視窗名稱 / 

#include <GL/glut.h>

#include <GL/glut.h> static void display(void) { glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glBegin(GL_TRIANGLES); glColor3f(1.0f, 0.0f, 0.0f); glVertex2f(0.0f, 1.0f); glColor3f(0.0f, 1.0f, 0.0f); glVertex2f(0.87f, -0.5f); glColor3f(0.0f, 0.0f, 1.0f); glVertex2f(-0.87f, -0.5f); glEnd(); glColor3f(1, 0, 0); glutSolidTeapot(0.3); glutSwapBuffers(); } int main(int argc, char *argv[]) { glutInit(&argc, argv); glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH); glutCreateWindow("08163105"); glutDisplayFunc(display); glutMainLoop(); }

 

考試三十分重點

　　glBegin(GL_TRIANGLES); glColor3f(1.0f, 0.0f, 0.0f); glVertex2f(0.0f, 1.0f); glColor3f(0.0f, 1.0f, 0.0f); glVertex2f(0.87f, -0.5f); glColor3f(0.0f, 0.0f, 1.0f); glVertex2f(-0.87f, -0.5f); glEnd();

點　　　glBegin(GL_LINE_LOOP);

glBegin(GL_POLYGON);多邊形 glColor3f(0.2f, 0.4f, 0.0f); for (float angle=0; angle<3.1459265358979*2; angle+=0.01){ glVertex2f(0.5*cos(angle),0.5*sin(angle)); } glEnd();