Week06
主題:打光
開啟的程式: Light Material.exe
(左上)左鍵按住拖曳可旋轉物體
(左上)右鍵，更換模型
(左下)右鍵，更換材質
[右邊的程式 glLightfv() => fv 為 float vector (陣列)
GLfloat light_pos[] = {-2.0, 2.0, 2.0, 1.0}; 陣列
glLightfv(GL_LIGHT0, GL_POSTION, 陣列)
第幾個燈
設定它的位置]
1.光的性質
(1)開啟CodeBlocks
(2)找到與Light有關的程式(先複製，下一個程式需要)
---------------------------------------------------------------------------------------
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 };
---------------------------------------------------------------------------------------
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);
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(3)今天的第一個程式碼
#include <GL/glut.h>
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 };
void display()
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glColor3f(1, 1, 0);
glutSolidTeapot(0.3);
glutSwapBuffers();
}
int main(int argc, char** argv)
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);
glutCreateWindow("week06 Light");
glutDisplayFunc(display);
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_LESS);
glEnable(GL_LIGHT0);
glEnable(GL_NORMALIZE);
glEnable(GL_COLOR_MATERIAL);
glEnable(GL_LIGHTING);
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);
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);
glutMainLoop();
}
(3-1)將上週的滑鼠函式加進去
#include <GL/glut.h>
#include <stdio.h>
float x=150, y=150, z=0, scale=1.0;
int oldX=0, oldY=0;
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 };
void display()
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glPopMatrix();
glTranslatef((x-150)/150.0, -(y-150)/150.0, z);
glScalef(scale, scale, scale);
glColor3f(1, 1, 0);
glutSolidTeapot(0.3);
glPopMatrix();
glutSwapBuffers();
}
void mouse(int button, int state, int mouseX, int mouseY)
{
oldX=mouseX;
oldY=mouseY;
}
void motion(int mouseX, int mouseY)
{
if(mouseX-oldX>0) scale*=1.01;
if(mouseY-oldY<0) scale*=0.99;
oldX=mouseX;
oldY=mouseY;
display();
}
int main(int argc, char** argv)
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);
glutCreateWindow("week06 Light");
glutDisplayFunc(display);
glutMouseFunc(mouse);
glutMotionFunc(motion);
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_LESS);
glEnable(GL_LIGHT0);
glEnable(GL_NORMALIZE);
glEnable(GL_COLOR_MATERIAL);
glEnable(GL_LIGHTING);
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);
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);
glutMainLoop();
}
(物體會隨著滑鼠拖曳放大或縮小)
(3-2)完成上星期的程式並修改
#include <GL/glut.h>
#include <stdio.h>
float x=150, y=150, z=0, scale=1.0, angle=0.0;
int oldX=0, oldY=0;
void display()
{
glClearColor(0.5, 0.5, 0.5, 1);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glPushMatrix();
glTranslatef( (x-150)/150.0, -(y-150)/150.0, z);
glRotatef(angle, 0, 1, 0);
glScalef(scale, scale, scale);
glColor3f(1,1,0);
glutSolidTeapot(0.3);
glPopMatrix();
glutSwapBuffers();
}
void keyboard( unsigned char key, int mouseX, int mouseY)
{
}
void mouse( int button, int state, int mouseX, int mouseY)
{
oldX = mouseX;
oldY = mouseY;
}
void motion( int mouseX, int mouseY)
{
angle+=(mouseX-oldX);
///if(mouseX-oldX > 0) scale*=1.01;
///if(mouseX-oldX < 0) scale*=0.99;
///x+=(mouseX-oldX);
///y+=(mouseY-oldY);
oldX = mouseX;
oldY = mouseY;
display();
}
int main(int argc, char**argv)
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);
glutCreateWindow("Week05 keyboard");
glutDisplayFunc(display);
glutKeyboardFunc(keyboard);
glutMouseFunc(mouse);
glutMotionFunc(motion);
glutMainLoop();
}
(滑鼠拖曳可旋轉物體)
(透過滑鼠將物體進行移動、旋轉、縮放)
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