練習期中考 第一次就100!
檔名:week06-1_lighting
『要加的11行』
'''cpp
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 };
'''
'''cpp
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);
'''
#include <GL/glut.h>
void display()
{
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
glutSolidTeapot(0.3);///畫一個實心的茶壺,大小是0.3
glutSwapBuffers();///請GLUT把畫面swap送到顯示的地方
}
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 };
int main(int argc, char *argv[])
{ ///上面是特別的main函式,有很多參數
glutInit(&argc, argv);///把GLUT開起來 （GLUT初始化）
glutInitDisplayMode( GLUT_DOUBLE | GLUT_DEPTH);
///上面這行是把顯示的模式設定好
glutCreateWindow("week06 lighting");///要開視窗
glutDisplayFunc(display);///要顯示的對應函式
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();///最後用main迴圈,壓在最後面
}
更改light_diffuse的值
-----------------------------------------------------------------------------------------------------------------------------
檔名:week06-2_lighting_Normal3f
目的:我們要把茶壺變成一個正方形,加上mouse轉動這個正方形
'''cpp
glBegin(BL_POLYGON);
glNormal3f(0,0,1);
glVertex2f(-1,-1);
glVertex2f(+1,-1);
glVertex2f(+1,+1);
glVertex2f(-1,+1);
glEnd();
'''
##先複製week06-1的程式碼
#include <GL/glut.h>
float angle=0;
void display()
{
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
//glutSolidTeapot(0.3);///畫一個實心的茶壺,大小是0.3
glPushMatrix();
glRotatef(angle++,0,1,0);
glScalef(0.8,0.8,0.8);
glBegin(GL_POLYGON);
glNormal3f(0,0,1);
glVertex2f(-1,-1);
glVertex2f(+1,-1);
glVertex2f(+1,+1);
glVertex2f(-1,+1);
glEnd();
glPopMatrix();
glEnd();
glutSwapBuffers();///請GLUT把畫面swap送到顯示的地方
}
const GLfloat light_ambient[] = { 0.0f, 0.0f, 0.0f, 1.0f };
const GLfloat light_diffuse[] = { 0.0f, 1.0f, 0.0f, 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 };
int main(int argc, char *argv[])
{ ///上面是特別的main函式,有很多參數
glutInit(&argc, argv);///把GLUT開起來 （GLUT初始化）
glutInitDisplayMode( GLUT_DOUBLE | GLUT_DEPTH);
///上面這行是把顯示的模式設定好
glutCreateWindow("week06 lighting");///要開視窗
glutDisplayFunc(display);///要顯示的對應函式
glutIdleFunc(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();///最後用main迴圈,壓在最後面
}
程式執行影片:
檔名:week06-3_glm_obj_model
#參考source.zip裡的transfomation檔
#把glm相關的程式碼複製下來
1)#include "glm.h"
2)GLMmodel* pmodel = NULL;
3) void drawmodel(void)
{
if (!pmodel) {
pmodel = glmReadOBJ("data/porsche.obj");
if (!pmodel) exit(0);
glmUnitize(pmodel);
glmFacetNormals(pmodel);
glmVertexNormals(pmodel, 90.0);
}
glmDraw(pmodel, GLM_SMOOTH | GLM_MATERIAL);
}
➡把source裡面的glm.c放到week06-3_glm_obj_model目錄裡 , 改名成glm.cpp
➡在專案裡面,按右鍵,新增檔案,將glm.cpp加入專案
➡將data資料夾,複製到 桌面\freeglut\bin執行目錄裡
➡把glutSolidTeapot(0.3);換成drawmodel();
#include <GL/glut.h>
#include "glm.h"///使用glm的程式碼
GLMmodel* pmodel = NULL;///加的程式,有顆指標,指到模型檔
void drawmodel(void)
{
if (!pmodel) {
pmodel = glmReadOBJ("data/al.obj");
if (!pmodel) exit(0);
glmUnitize(pmodel);
glmFacetNormals(pmodel);
glmVertexNormals(pmodel, 90.0);
}
glmDraw(pmodel, GLM_SMOOTH | GLM_MATERIAL);
}
void display()
{
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
drawmodel();///glutSolidTeapot(0.3);
glutSwapBuffers();
}
int main(int argc, char *argv[])
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
glutCreateWindow("week06-3");
glutDisplayFunc(display);
glutMainLoop();
}
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