//--------------------------------------------------------------
void ofApp::DrawKoch(ofVec2f start,ofVec2f end, int depth){
if(depth < 10){
ofVec2f mid1 = start + (end-start) / 3.0f;
ofVec2f mid3 = start + (end-start) / 3.0f * 2;
ofVec2f mid2_temp = (start+end) / 2.0f;
float dist = ofDist(start.x, start.y, end.x, end.y);
//片方マイナスにしないとおかしくなる
ofVec2f mid2 = ofVec2f(
mid2_temp.x - (end.y - start.y) / 3.0f *(sqrt(3.0)/2),
mid2_temp.y + (end.x - start.x) / 3.0f *(sqrt(3.0)/2));
depth++;
DrawKoch(start, mid1, depth);
DrawKoch(mid1, mid2, depth);
DrawKoch(mid2, mid3, depth);
DrawKoch(mid3, end, depth);
}else{
ofDrawLine(start, end);
}
}
//--------------------------------------------------------------
void ofApp::draw(){
DrawKoch(ofVec2f(ofGetWidth()-200,540),ofVec2f(200,540),_depth);
DrawKoch(ofVec2f(ofGetWidth()/2,0),ofVec2f(ofGetWidth()-200,540),_depth);
DrawKoch(ofVec2f(200,540),ofVec2f(ofGetWidth()/2,0),_depth);
ofDrawBitmapString("FrameNum"+ofToString(ofGetElapsedTimef()), 30,45);
ofDrawBitmapString("Depth"+ofToString(_depth), 30,30);
}
void DrawKoch(float* vx, float* vy, double angle, int times)
{
float Vsnow[3][2] = {{0, 0}, {0, 0}, {0, 0}};
if( times == 0 ){
glBegin(GL_LINES);
glColor3f(0, 255, 0);
glVertex2f(vx[0], 480 - vx[1]);
glVertex2f(vy[0], 480 - vy[1]);
glEnd();
}else{
times--;
/* Compute the 1st and 3rd Point along the input line */
if ((vx[0] <= vy[0]) && (vx[1] <= vy[1])){
Vsnow[0][0] = vx[0] + (vy[0] - vx[0])/3;
Vsnow[2][0] = vx[0] + 2*(vy[0] - vx[0])/3;
Vsnow[0][1] = vx[1] + (vy[1] - vx[1])/3;
Vsnow[2][1] = vx[1] + 2*(vy[1] - vx[1])/3;
}
if ((vx[0] <= vy[0]) && (vx[1] >= vy[1])){
Vsnow[0][0] = vx[0] + (vy[0] - vx[0])/3;
Vsnow[2][0] = vx[0] + 2*(vy[0] - vx[0])/3;
Vsnow[0][1] = vy[1] + 2*(vx[1] - vy[1])/3;
Vsnow[2][1] = vy[1] + (vx[1] - vy[1])/3;
}
if ((vx[0] >= vy[0]) && (vx[1] >= vy[1])){
Vsnow[0][0] = vy[0] + 2*(vx[0] - vy[0])/3;
Vsnow[2][0] = vy[0] + (vx[0] - vy[0])/3;
Vsnow[0][1] = vy[1] + 2*(vx[1] - vy[1])/3;
Vsnow[2][1] = vy[1] + (vx[1] - vy[1])/3;
}
if ((vx[0] >= vy[0]) && (vx[1] <= vy[1])){
Vsnow[0][0] = vy[0] + 2*(vx[0] - vy[0])/3;
Vsnow[2][0] = vy[0] + (vx[0] - vy[0])/3;
Vsnow[0][1] = vx[1] + (vy[1] - vx[1])/3;
Vsnow[2][1] = vx[1] + 2*(vy[1] - vx[1])/3;
}
/* Compute the coordinate of the Middle Point*/
Vsnow[1][0] = Vsnow[2][0]/2 - Vsnow[2][1]*(sqrt(3)/2) + Vsnow[0][0]/2 \
+ Vsnow[0][1]*(sqrt(3)/2);
Vsnow[1][1] = Vsnow[2][0]*(sqrt(3)/2) + Vsnow[2][1]/2 + Vsnow[0][1]/2 \
- Vsnow[0][0]*(sqrt(3)/2);
DrawKoch(vx, Vsnow[0], Pi/3, times);
DrawKoch(Vsnow[0], Vsnow[1], Pi/3, times);
DrawKoch(Vsnow[1], Vsnow[2], Pi/3, times);
DrawKoch(Vsnow[2], vy, Pi/3, times);
}
}
//
// Draw the scene
//
void DrawScene()
{
renderBitmapString(20, 20, GLUT_BITMAP_HELVETICA_18, "Press <- or -> ro rotate the object.");
renderBitmapString(20, 40, GLUT_BITMAP_HELVETICA_18, "Repeatedly press will increase the rotating speed.");
renderBitmapString(20, 60, GLUT_BITMAP_HELVETICA_18, "Press Esc to exit.ENJOY ^_^");
if (PointsCounter == 3 && TurnLeft == true){
// DrawTriangle();
/* glBegin(GL_LINE_LOOP);
glColor3f(0, 255, 255);
glVertex2f(ClickedPoints[0][0], 480 - ClickedPoints[0][1]);
glVertex2f(ClickedPoints[1][0], 480 - ClickedPoints[1][1]);
glVertex2f(ClickedPoints[2][0], 480 - ClickedPoints[2][1]);
glEnd();
*/
glLoadIdentity();
glTranslatef(TriCenter[0], TriCenter[1], 0);
glRotatef(-RotationAngle, 0.0, 0.0, 0.000001);
glTranslatef(-TriCenter[0], -TriCenter[1], 0);
sleepControl();
DrawKoch(ClickedPoints[0], ClickedPoints[1], Pi/3, 4);
DrawKoch(ClickedPoints[1], ClickedPoints[2], Pi/3, 4);
DrawKoch(ClickedPoints[2], ClickedPoints[0], Pi/3, 4);
}
if (PointsCounter == 3 && TurnRight == true){
glLoadIdentity();
glTranslatef(TriCenter[0], TriCenter[1], 0);
glRotatef(RotationAngle, 0.0, 0.0, 1.0);
glTranslatef(-TriCenter[0], -TriCenter[1], 0);
sleepControl();
DrawKoch(ClickedPoints[0], ClickedPoints[1], Pi/3, 4);
DrawKoch(ClickedPoints[1], ClickedPoints[2], Pi/3, 4);
DrawKoch(ClickedPoints[2], ClickedPoints[0], Pi/3, 4);
}
if (PointsCounter == 3 && TurnRight == false && TurnLeft == false){
// renderBitmapString(20, 20, GLUT_BITMAP_HELVETICA_18, "Press <- or -> ro rotate the object.");
// renderBitmapString(20, 40, GLUT_BITMAP_HELVETICA_18, "Repeatedly press will increase the rotating speed.");
// renderBitmapString(20, 50, GLUT_BITMAP_HELVETICA_18, "Press Esc to exit.ENJOY ^_^");
DrawKoch(ClickedPoints[0], ClickedPoints[1], Pi/3, 4);
DrawKoch(ClickedPoints[1], ClickedPoints[2], Pi/3, 4);
DrawKoch(ClickedPoints[2], ClickedPoints[0], Pi/3, 4);
}
}
