m week08

week08

 step01-1

到https://jsyeh.org/3dcg10/

下載source,data,windows

了解3D模型是如何產生

v 對應 vertex頂點

vt 對應 貼圖座標 glTexCoord2f(tx,ty)

vn 對應 vertex normal法向量

f 對應 面facet

打開data

al.obj

step01-2

打開Maya

選擇windows

選擇Setting/Preference

選擇Plug-in Manager

尋找objExport.mll 

兩個都要勾選

匯出Expot all

檔案形式改成objExport

檔名F-16

放到data裡

step02-1

新增GLUT專案 week08-1_glm_model

刪除程式碼

貼上

#include <GL/glut.h>

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_RGB | GLUT_DOUBLE | GLUT_DEPTH);

glutCreateWindow("week08");

glutDisplayFunc(display);

glutMainLoop();

}

改成

#include <GL/glut.h>

#include "glm.h"

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_RGB | GLUT_DOUBLE | GLUT_DEPTH);

glutCreateWindow("week08");

glutDisplayFunc(display);

glutMainLoop();

}

把source裡的glm.h放在week08-1_glm_model的目錄裡

把source裡的glm.c放在week08-1_glm_model的目錄裡

改成glm.cpp

在專案week08-1_glm_model按下右鍵

選擇Add File

選擇glut.cpp

把3D檔案放在freeglut的bin資料夾

#include <GL/glut.h>

#include "glm.h"

GLMmodel * pmodel=NULL;

void display()

{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    if(pmodel=NULL){

        pmodel=glmReadOBJ("F-16.obj");///檔名用你的檔名

        glmUnitize(pmodel);

        }

    glmDraw(pmodel, GLM_SMOOTH | GLM_MATERIAL);

    ///glutSolidTeapot( 0.3 );

    glutSwapBuffers();

}

int main(int argc, char *argv[])

{

glutInit(&argc, argv);

glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);

glutCreateWindow("week08");

glutDisplayFunc(display);

glutMainLoop();

}

step03-1

新增專案week08-2_glm_model_texture

把source裡的glm.h放在week08-1_glm_model_texture的目錄裡

把source裡的glm.c放在week08-1_glm_model_texture的目錄裡

改成glm.cpp

#include <GL/glut.h>

#include "glm.h"

GLMmodel * pmodel=NULL;

void display()

{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    if(pmodel=NULL){

        pmodel=glmReadOBJ("Gundam.obj");///檔名用你的檔名

        glmUnitize(pmodel);

        glmFacetNormals(pmodel);

        glmVertexNormals(pmodel,90);

        }

    glmDraw(pmodel, GLM_SMOOTH | GLM_MATERIAL);

    ///glutSolidTeapot( 0.3 );

    glutSwapBuffers();

}

int main(int argc, char *argv[])

{

glutInit(&argc, argv);

glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);

glutCreateWindow("week08");

glutDisplayFunc(display);

glutMainLoop();

}

到gist.github.com/jsyeh

myTexture

改成

#include <GL/glut.h>

#include <opencv/highgui.h> ///使用 OpenCV 2.1 比較簡單, 只要用 High GUI 即可

#include <opencv/cv.h>

#include <GL/glut.h>

int myTexture(char * filename)

{

    IplImage * img = cvLoadImage(filename); ///OpenCV讀圖

    cvCvtColor(img,img, CV_BGR2RGB); ///OpenCV轉色彩 (需要cv.h)

    glEnable(GL_TEXTURE_2D); ///1. 開啟貼圖功能

    GLuint id; ///準備一個 unsigned int 整數, 叫 貼圖ID

    glGenTextures(1, &id); /// 產生Generate 貼圖ID

    glBindTexture(GL_TEXTURE_2D, id); ///綁定bind 貼圖ID

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT); /// 貼圖參數, 超過包裝的範圖T, 就重覆貼圖

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT); /// 貼圖參數, 超過包裝的範圖S, 就重覆貼圖

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); /// 貼圖參數, 放大時的內插, 用最近點

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); /// 貼圖參數, 縮小時的內插, 用最近點

    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, img->width, img->height, 0, GL_RGB, GL_UNSIGNED_BYTE, img->imageData);

    return id;

}

#include "glm.h"

GLMmodel * pmodel=NULL;

void display()

{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    if(pmodel=NULL){

        pmodel=glmReadOBJ("Gundam.obj");///檔名用你的檔名

        glmUnitize(pmodel);

        glmFacetNormals(pmodel);

        glmVertexNormals(pmodel,90);

        }

    glmDraw(pmodel, GLM_SMOOTH | GLM_MATERIAL | GLM_TEXTURE);

    ///glutSolidTeapot( 0.3 );

    glutSwapBuffers();

}

int main(int argc, char *argv[])

{

glutInit(&argc, argv);

glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);

glutCreateWindow("week08");

mytexture("Diffuse.jpg");

glutDisplayFunc(display);

glutMainLoop();

}