Week 09 20170501 鄭雅至的課堂筆記

Week 09

HW 1

1. Google 搜尋 3D exploration ，選擇第一個。

2. 點選 下載(v1.81)。

3. 下載後，解壓縮安裝並且打開軟體。

4. 到網頁上(jsyeh.org/3dcg10)下載data.zip，並且解壓縮。

5. 到 3D 那邊選擇data資料夾，選擇想要的模型。

6. 選擇想要的模型後，另存新檔選擇cpp檔。(一定要勾 Export Dialog並且選擇Sample APP)

7. 打開CodeBlocks，新增新的OpenGL專案。

8. 把OpenGL檔的main先移除，然後把前面所存的cpp檔複製過去，用add files把程式碼打開。(因為程式碼太舊有兩行會挑出錯誤需要注解掉)

HW 2

1. 開起老師給的專案。

程式碼：
#include <string.h>
#include <stdlib.h>
#include <GL/glut.h>
#include "glm.h"
GLMmodel* pmodel = NULL;
float angle=0;
void display()
{
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    glPushMatrix();
        angle++;
        glRotatef(angle, 0,1,0);
        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);
    glPopMatrix();
    glutSwapBuffers();
}
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)
{
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH | GLUT_RGB);
    glutCreateWindow("Yes, 3D Model Here");

    glutDisplayFunc(display);
    glutIdleFunc(display);

    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);

    glutMainLoop();
}

2. 把範例模型拆解。

3. 放入專案裡。

程式碼：
#include <string.h>
#include <stdlib.h>
#include <GL/glut.h>
#include "glm.h"
GLMmodel* pmodel1 = NULL;
GLMmodel* pmodel2 = NULL;
GLMmodel* pmodel3 = NULL;
float angle=0;
void display()
{
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    glPushMatrix();
        angle++;
        glRotatef(angle, 0,1,0);

        if (!pmodel1) {
        pmodel1 = glmReadOBJ("data/dolphins1.obj");
        if (!pmodel1) exit(0);
        glmUnitize(pmodel1);
        glmFacetNormals(pmodel1);
        glmVertexNormals(pmodel1, 90.0);
        }

        if (!pmodel2) {
        pmodel2 = glmReadOBJ("data/dolphins2.obj");
        if (!pmodel2) exit(0);
        glmUnitize(pmodel2);
        glmFacetNormals(pmodel2);
        glmVertexNormals(pmodel2, 90.0);
        }

        if (!pmodel3) {
        pmodel3 = glmReadOBJ("data/dolphins3.obj");
        if (!pmodel3) exit(0);
        glmUnitize(pmodel3);
        glmFacetNormals(pmodel3);
        glmVertexNormals(pmodel3, 90.0);
        }

        glPushMatrix();
            glTranslatef(0,0.5,0.3);
            glScalef(0.6,0.6,0.6);
            glmDraw(pmodel1, GLM_SMOOTH | GLM_MATERIAL);
        glPopMatrix();
        glPushMatrix();
            glTranslatef(0,-0.5,0);
            glScalef(0.6,0.6,0.6);
            glmDraw(pmodel2, GLM_SMOOTH | GLM_MATERIAL);
        glPopMatrix();
        glPushMatrix();
            glTranslatef(0.3,0,-0.5);
            glScalef(0.6,0.6,0.6);
            glmDraw(pmodel3, GLM_SMOOTH | GLM_MATERIAL);
        glPopMatrix();

    glPopMatrix();
    glutSwapBuffers();
}
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)
{
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH | GLUT_RGB);
    glutCreateWindow("Yes, 3D Model Here");

    glutDisplayFunc(display);
    glutIdleFunc(display);

    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);

    glutMainLoop();
}