C~電腦圖學日誌 Week13

Week13

week13-1_glm_gundam_keyboard
_angleID_mouse_motion_angle

1. 安裝freeglut，複製libfreeglut.a改成libglut32.a

2. 下載OpenCV選第2或3選項別選第1個

3. 安裝在預設的目錄，重開CodeBlocks(讓編譯器讀到檔案)

3.0 去設定 Settings->Compiler 要加3個設定

3.1 search目錄 Compiler的 include目錄  加C:\OpenCV2.1\include

3.2 search目錄 Linker 的 lib目錄  加C:\OpenCV2.1\lib

3.3 加入Linker設定的 3個檔名 cv210 cxcore210 highgui210

4. 將week12-3_glm_gundam_keyboard_angleID_mouse_motion_angle
    改成week13-1_glm_gundam_keyboard_angleID_mouse_motion_angle

5. 新增用鍵盤控制旋轉關節

註解掉//float angle = 0, da = 1;

float angle[20] = {};///設20個角度

int angleID = 0;///當個角度的index

void motion(int x, int y){

    angle[angleID] = y;

    glutPostRedisplay();///要重畫畫面

}

void keyboard(unsigned char key, int x,int y){

    if(key=='0') angleID = 0;

    if(key=='1') angleID = 1;

    if(key=='2') angleID = 2;

    if(key=='3') angleID = 3;

}

void display(){
      中的angle改成angle[0]
                               angle[1]
}

int main(){

glutKeyboardFunc(keyboard);///week13用鍵盤控制哪個關節轉動

}

6. 讓轉動變滑順

week13-2_FILE_fopen_fprintf_fscanf

輸出用滑鼠改變的角度，並生成angle.txt的檔案來記錄

1. 將week13-1_glm_gundam_keyboard_angleID_mouse_motion_angle
    改成week13-2_FILE_fopen_fprintf_fscanf

2. 加FILE指標

‵‵‵cpp

FILE * fin = NULL;

FILE * fout = NULL;

‵‵‵

3. motion()修改

void motion(int x, int y){

    angle[angleID] += y-oldY;

    oldX = x;

    oldY = y;

    glutPostRedisplay();///要重畫畫面

    if(fout==NULL) fout = fopen("angle.txt", "w+");

    for(int i=0;i<20;i++){

        printf("%.1f ",angle[i] );

        fprintf(fout,"%.1f ",angle[i] );

    }

    printf("\n");

    fprintf(fout,"\n");

}

4. 要讀檔案 angle.txt(要有空格)
長按R鍵 會讀取txt檔案中的座標並進行轉動

void keyboard(unsigned char key, int x, int y){

    if(key=='r'){

        if(fin==NULL) fin = fopen("angle.txt", "r");

        for(int i=0;i<20;i++){

            fscanf(fin,"%f", &angle[i] );

        }

        glutPostRedisplay();

    }

    if(key=='0') angleID = 0;

    if(key=='1') angleID = 1;

    if(key=='2') angleID = 2;

    if(key=='3') angleID = 3;

}

5. 新增鋼彈身體

GLMmodel * body = NULL;

void drawBody(void)

{

    if (!body) {

body = glmReadOBJ("data/body.obj");

if (!body) exit(0);

glmUnitize(body);

glmFacetNormals(body);

glmVertexNormals(body, 90.0);

    }

    glmDraw(body, GLM_SMOOTH | GLM_TEXTURE);

}

void dispaly(){

修改

drawBody();///畫剛彈身體

glTranslatef(-0.1, 0, 0);///掛在肩上

}

7. 改成控制4個關節點 

void display()

{

    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

    glDisable(GL_TEXTURE_2D);

    glPushMatrix();

        glRotatef(angle[0], 0, 1, 0);

        drawBody();///畫剛彈身體

        //glutSolidSphere(0.1, 30, 30);///關節點

        glEnable(GL_TEXTURE_2D);

        glColor3f(1, 1, 1);

        glPushMatrix();

            glTranslatef(-0.1, 0, 0);///掛在肩上

            glRotatef(angle[1], 0, 0, 1);

            glRotatef(angle[2], 1, 0, 0);

            glTranslatef(0, -0.07, 0);

            drawUpperA();

            glPushMatrix();

                glTranslatef(-0.02, -0.09, 0);///(3)掛到上手臂上

                glRotatef(angle[3], 1, 0, 0);///(2)x軸轉

                glTranslatef(0, -0.21, 0);///(1)

                drawLowerA();///

            glPopMatrix(); ///

        glPopMatrix(); ///

    glPopMatrix();

    glutSwapBuffers();

}

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