Kuo's Graphic_Note_Week11

 Step 1 : Using CodeBlocks to Light up a Teapot.

    1-1. Coding

   

     1-2. Coding

 Step 2 : Using CodeBlocks to make Gundam

    2-1. Coding

    2-2. Build & Run

    2-3. Rotate texture file (Diffuse.jpg)

     2-4. Build & Run again

Final Code:

#include <GL/glut.h>

#include <opencv/highgui.h>

#include <opencv/cv.h>

#include "glm.h"

GLMmodel * pmodel = NULL;

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;

}

float angle=0;

void display(){

    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

        glRotatef(angle,0,1,0);

        if(pmodel==NULL){

            pmodel=glmReadOBJ("data/Gundam.obj");

            glmUnitize(pmodel);

            glmFacetNormals(pmodel);

            glmVertexNormals(pmodel,90);

        }

        glmDraw(pmodel,GLM_MATERIAL|GLM_TEXTURE);

    glPopMatrix();

    glutSwapBuffers();

    angle++;

}

int main(int ac,char**av){

    glutInit(&ac,av);

    glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);

    glutCreateWindow("week10 texture model");

    glutIdleFunc(display);

    glutDisplayFunc(display);

    myTexture("data/Diffuse.jpg");

    glEnable(GL_DEPTH_TEST);

    glutMainLoop();

}