week10.汪

11周上課內容

介紹obj的模型

建立3D模型

1.要將下載下來的2個glm丟進codeblock的資料夾

2.data丟進bin裡面

程式碼本碼

#include <GL/glut.h>

#include "glm.h"///使用glm外掛,glm.h需再專案同一目錄裡

GLMmodel * model=NULL;///glm的資料結構,先null空

void display()

{

    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

    if(model==NULL)

    {

        model=glmReadOBJ("data/Al.obj");///讀入模型

        glmUnitize(model);///unit單位大小-1..+1

        glmFacetNormals(model);///計算face的法向量

        glmVertexNormals(model,90);///推算vertex的法向量

    }

    glmDraw(model, GLM_SMOOTH|GLM_MATERIAL);

    glutSwapBuffers();

}

int main(int argc,char**argv)

{

    glutInit(&argc,argv);

    glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);

    glutCreateWindow("week11");

    glutDisplayFunc(display);

    glutMainLoop();

}

複習打光

1.加入

在void display上方

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 };

再glutDisplayFunc(display)下方

 glEnable(GL_DEPTH_TEST);

 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);