電腦圖學
2019-03-28 Week06
(1) 主題: 打光 Part1
這三個檔案處理好的範例程式.zip檔 & freeglut下載下來 > 點開範例Light Material.exe
(這次需要多下載[source]範例程式碼！！)
程式碼(打光)
#include <GL/glut.h>
///這次新增的部分，打光的程式碼
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 };
///以上
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_DOUBLE | GLUT_DEPTH);
glutCreateWindow("06160955_Week06");
glutDisplayFunc(display);
///一堆 OpenGL 設定在這裡
glClearColor(1,1,1,1);
glEnable(GL_CULL_FACE);
glCullFace(GL_BACK);
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);
///以上
glutMainLoop();
}
(2) 主題: 模型 OBJ檔
程式碼(加入模型)
#include <GL/glut.h>
#include "glm.h"///現在要有 3D Model 的第一行
GLMmodel* pmodel = NULL;///現在要有 3D Model 的第二行
///這次新增的部分，打光的程式碼
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 };///打光的角度
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 };
///以上
void display()
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
//glutSolidTeapot(0.3);
///現在要有 3D Model 的第三段
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);
///以上
glutSwapBuffers();
}
int main(int argc, char **argv)
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);
glutCreateWindow("06160955_Week06");
glutDisplayFunc(display);
///一堆 OpenGL 設定在這裡
glClearColor(1,1,1,1);
//glEnable(GL_CULL_FACE);
glCullFace(GL_BACK);
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);
///以上
glutMainLoop();
}
(3) 實作: GLM vs. OBJ
(4) 回家作業
這次的回家作業要做的是將自己做的MAYA模型匯入GLUT，
我結合了第五週所教的Rotate，再多新增Y軸的變數，
讓我可以使用滑鼠自由旋轉觀看我匯入的模型。
程式碼
#include <GL/glut.h>
#include "glm.h"///現在要有 3D Model 的第一行
GLMmodel* pmodel = NULL;///現在要有 3D Model 的第二行
float angleX=0, angleY=0;///今天新教的!!!!
///這次新增的部分，打光的程式碼
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 };///打光的角度
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 };
///以上
void display()
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
//glutSolidTeapot(0.3);
glPushMatrix();///Push備份保護Matrix
glRotatef(angleX, angleY, 1, 0);///今天新教的!!!! 對Y軸，轉angle度
if (!pmodel) {///現在要有 3D Model
pmodel = glmReadOBJ("D:/My Courses/大二課程/電腦圖學/Week06_HW/freeglut/bin/data/screen.obj");///現在要有 3D Model
if (!pmodel) exit(0);///現在要有 3D Model
glmUnitize(pmodel);///現在要有 3D Model
glmFacetNormals(pmodel);///現在要有 3D Model
glmVertexNormals(pmodel, 90.0);///現在要有 3D Model
}///現在要有 3D Model
glmDraw(pmodel, GLM_SMOOTH | GLM_MATERIAL);///現在要有 3D Model
glPopMatrix();///Pop還原Matrix
glutSwapBuffers();
}
void motion(int x, int y)///現在要新加的!!!!
{///當你的mouse去drag作motion動作時，
angleX=x;///現在要新加的!!!!
angleY=y;
display();///現在要新加的!!!!
}
int main(int argc, char **argv)
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);
glutCreateWindow("06160955_Week06");
glutDisplayFunc(display);
///一堆 OpenGL 設定在這裡
glClearColor(1,1,1,1);
glEnable(GL_CULL_FACE);
glCullFace(GL_BACK);
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);
///以上
glutIdleFunc(display);///今天新教的!!!! Idle閒閒沒事，就重畫
glutMotionFunc(motion);///現在要新加的!!!!
glutMainLoop();
}
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