Macで GLUT + OpenGL のんびりいこう#7 Rolate Cube

前提

Mac OSX 10.7.5
Developer Tool

目標

Cubeを回転させる。

Glangle.cpp

Glangle.cpp

#include <GLUT/glut.h>

#define WIDTH 640
#define HEIGHT 480

//回転用
float angle = 0.0f;

//cubeの色
GLfloat green[] = { 0.0, 1.0, 0.0, 1.0};
float Radius=80.0f;

//3つのベクトル
struct Vector3f{
    float x;
    float y;
    float z;
}vec3d;


void Line3D(float x1,float y1,float z1,float x2,float y2,float z2){
//線幅
    glLineWidth(1.0);
//線
    glBegin(GL_LINES);
    glVertex3f(x1,y1,z1);
    glVertex3f(x2,y2,z2);
    glEnd();
}

void DrawMeasure(int measure,float size){
    glDisable(GL_LIGHTING);
    glColor4f(1.0f, 1.0f, 1.0f, 1.0f);
    for(int x=0;x<=measure;x++){Line3D(x*size-(size*measure/2),0,-(size*measure/2),x*size-(size*measure/2),0,measure*size-(size*measure/2));}
    for(int y=0;y<=measure;y++){Line3D(-(size*measure/2),0,y*size-(size*measure/2),measure*size-(size*measure/2),0,y*size-(size*measure/2));}
    glDisable(GL_DEPTH_TEST);
    glColor4f(1.0f, 0.0f, 0.0f, 1.0f);
    Line3D(0,0,0,(measure/2+2)*size,0,0);
    glColor4f(0.0f, 1.0f, 0.0f, 1.0f);
    Line3D(0,0,0,0,(measure/2+2)*size,0);
    glColor4f(0.0f, 0.0f, 1.0f, 1.0f);
    Line3D(0,0,0,0,0,(measure/2+2)*size);
    glEnable(GL_LIGHTING);
    glEnable(GL_DEPTH_TEST);
}

void display(void)
{
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    glViewport(0, 0, WIDTH, HEIGHT);
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();

    gluPerspective(30.0, (double)WIDTH / (double)HEIGHT, 1.0, 5000.0);
    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();

    gluLookAt(0.0,800.0,800.0,
      0.0,0.0,0.0,
     0.0,1.0,0.0);

    glColor3f(1,1,1);
    DrawMeasure(16,40);

    glMaterialfv(GL_FRONT, GL_DIFFUSE, green);
    glRotatef(angle,vec3d.x,vec3d.y,vec3d.z);

    glutSolidCube(80.0);

    glutSwapBuffers();
}
void idle(void)
{
    angle+=2.0f;
    //Sleep(1);
    glutPostRedisplay();
}
void Init(){
    glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
    glEnable(GL_DEPTH_TEST);
    glEnable(GL_LIGHTING);
    glEnable(GL_LIGHT0);
    //任意軸のベクトルを設定
    vec3d.x=45.0f;
    vec3d.y=90.0f;
    vec3d.z=0.0f;
}
int main(int argc, char *argv[])
{
    glutInitWindowPosition(100, 100);
    glutInitWindowSize(WIDTH, HEIGHT);
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_RGBA | GLUT_DOUBLE);
    glutCreateWindow("Rotate Cube");
    glutDisplayFunc(display);
    glutIdleFunc(idle);
    Init();
    glutMainLoop();
    return 0;
}

コンパイル

framework指定が要点です。
g++ -o Glangle Glangle.cpp -framework GLUT -framework OpenGL

Result

保守用履歴

今の環境でも確認できたので安心。