2020電腦圖學B: 兩百一5

🌠🔥第5週😚😚

以下是簡易步驟

先到網址下載檔案(data,windows,glut32.dll):

http://www.cmlab.csie.ntu.edu.tw/~jsyeh/3dcg10/

1 按照上次說的將data,glut32.dll拉進windows資料夾

2 打開light material

3 物件上右鍵可選擇材質

4 上圖為ruby

5 上圖為pearl

6 上圖為gold

接下來打開codeblocks->glut

以下為程式碼:
#include <GL/glut.h>

///打光的第0步,宣告陣列,裡面有光的屬性值
const GLfloat light_ambient[] = { 0.0f, 0.0f, 0.0f, 1.0f };
const GLfloat light_diffuse[] = { 1.0f, 1.0f, 1.0f, 1.0f };
const GLfloat light_specular[] = { 1.0f, 1.0f, 1.0f, 1.0f };
const GLfloat light_position[] = { 2.0f, 5.0f, 5.0f, 0.0f };

const GLfloat mat_ambient[] = { 0.7f, 0.7f, 0.7f, 1.0f };
const GLfloat mat_diffuse[] = { 0.8f, 0.8f, 0.8f, 1.0f };
const GLfloat mat_specular[] = { 1.0f, 1.0f, 1.0f, 1.0f };
const GLfloat high_shininess[] = { 100.0f };

/* Program entry point */
void display()
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glutSolidTeapot(0.3);
glutSwapBuffers();
}

int main(int argc, char *argv[])
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
glutCreateWindow("GLUT Shapes");
glutDisplayFunc(display);

///打光也需要 3D的 depth test
glEnable(GL_DEPTH_TEST);

///打光1:要開啟光線, 原來範例就寫好了
glEnable(GL_LIGHT0);
glEnable(GL_NORMALIZE);
glEnable(GL_COLOR_MATERIAL);
glEnable(GL_LIGHTING);
///打光2:要設定光light的設定值 (前面有陣列,這裡拿來用
glLightfv(GL_LIGHT0, GL_AMBIENT, light_ambient);
glLightfv(GL_LIGHT0, GL_DIFFUSE, light_diffuse);
glLightfv(GL_LIGHT0, GL_SPECULAR, light_specular);
glLightfv(GL_LIGHT0, GL_POSITION, light_position);
///打光2.2: 要把物體也設定好它的 material
glMaterialfv(GL_FRONT, GL_AMBIENT, mat_ambient);
glMaterialfv(GL_FRONT, GL_DIFFUSE, mat_diffuse);
glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular);
glMaterialfv(GL_FRONT, GL_SHININESS, high_shininess);
///其實原本177行程裡,已經有打光需要的程式了
glutMainLoop();

return EXIT_SUCCESS;
}