//--------------------------------------------------------------
ofMesh pen::createCircle(float x, float y, float radius, ofColor color){
float sides = 30;
ofMesh mesh;
mesh.setMode(OF_PRIMITIVE_TRIANGLE_FAN);
color.setBrightness(ofRandom(100,250));
for(int i=0; i<=sides; i++){
float pointRatio = i/sides;
float xSteps = cos(pointRatio*2*PI);
float ySteps = sin(pointRatio*2*PI);
float pointX = x + xSteps * radius;
float pointY = y + ySteps * radius;
mesh.addVertex(ofPoint(pointX, pointY));
mesh.addColor(color);
}
return mesh;
}
//--------------------------------------------------------------
ofMesh pen::lineToMesh(ofPolyline line,ofColor color, float thicknessOffset, ofVec2f positionOffset){
ofMesh mesh;
mesh.setMode(OF_PRIMITIVE_TRIANGLE_STRIP);
vector<ofPoint> points = line.getVertices();
int brightness = 255;
for(int i = 1; i < points.size(); i++){
ofVec2f thisPoint = ofVec2f(points[i-1].x,points[i-1].y);
ofVec2f nextPoint = ofVec2f(points[i].x,points[i].y);
ofVec2f direction = (nextPoint - thisPoint);
float distance = direction.length();
ofVec2f unitDirection = direction.normalized();
ofVec2f toTheLeft = unitDirection.getRotated(-90);
ofVec2f toTheRight = unitDirection.getRotated(90);
float thickness = ofMap(thisPoint.y, 0, ofGetScreenHeight(), 5, 40);
thickness += thicknessOffset;
if (thicknessOffset == 0)
color.setBrightness(ofMap(i, 0, points.size(), 250, 200));
ofVec2f leftPoint = thisPoint+toTheLeft*thickness;
ofVec2f rightPoint = thisPoint+toTheRight*thickness;
if (thicknessOffset > 0 && i == 1){
ofVec2f tempLeftPoint = leftPoint;
ofVec2f tempRightPoint = rightPoint;
tempLeftPoint -= unitDirection * (thickness/2);
tempRightPoint -= unitDirection * (thickness/2);
mesh.addVertex(ofVec2f(tempLeftPoint.x + positionOffset.x, tempLeftPoint.y + positionOffset.y));
mesh.addColor(color);
mesh.addVertex(ofVec2f(tempRightPoint.x + positionOffset.x, tempRightPoint.y + positionOffset.y));
mesh.addColor(color);
}
mesh.addVertex(ofVec2f(leftPoint.x, leftPoint.y + positionOffset.y));
mesh.addColor(color);
mesh.addVertex(ofVec2f(rightPoint.x, rightPoint.y + positionOffset.y));
mesh.addColor(color);
if (thicknessOffset > 0 && i == points.size()-1){
leftPoint += unitDirection * (thickness/3) + positionOffset;
rightPoint += unitDirection * (thickness/3) + positionOffset;
mesh.addVertex(leftPoint);
mesh.addColor(color);
mesh.addVertex(rightPoint);
mesh.addColor(color);
}
//Add arrow
if (i == points.size()-1 ){
leftPoint = thisPoint+toTheLeft*thickness*1.5;
rightPoint = thisPoint+toTheRight*thickness*1.5;
mesh.addVertex(leftPoint);
mesh.addColor(color);
mesh.addVertex(rightPoint);
mesh.addColor(color);
mesh.addVertex(nextPoint + unitDirection * thickness*2.5);
mesh.addColor(color);
}
}
return mesh;
}
//--------------------------------------------------------------
ofMesh pen::extrudeMesh(ofMesh mesh, ofColor color){
ofMesh side;
float depth = 50;
color.setBrightness(250);
vector<ofPoint> points = mesh.getVertices();
int k;
if (points.size() > 4){
ofPoint p1 = points[0];
ofPoint p2 = points[1];
side.addVertex(p1);
side.addColor(color);
side.addVertex(p2);
side.addColor(color);
side.addVertex(ofPoint(p1.x, p1.y, p1.z-depth));
side.addColor(color);
side.addVertex(ofPoint(p1.x, p1.y, p1.z-depth));
side.addColor(color);
side.addVertex(ofPoint(p2.x, p2.y, p2.z-depth));
side.addColor(color);
side.addVertex(p2);
side.addColor(color);
for(k=0; k<points.size()-2; k++)
{
ofPoint p1 = points[k+0];
ofPoint p2 = points[k+2];
side.addVertex(p1);
side.addColor(color);
side.addVertex(p2);
side.addColor(color);
side.addVertex(ofPoint(p1.x+5, p1.y, p1.z-depth));
side.addColor(color);
if (ofRandom(0,25) < 1)
color.setBrightness(ofMap(k, 0, points.size(), 100, 50));
else
color.setBrightness(ofMap(k, 0, points.size(), 150, 100));
side.addVertex(ofPoint(p1.x+5, p1.y, p1.z-depth));
side.addColor(color);
side.addVertex(ofPoint(p2.x+5, p2.y, p2.z-depth));
side.addColor(color);
side.addVertex(p2);
side.addColor(color);
}
p1 = points[points.size()-2];
p2 = points[points.size()-1];
side.addVertex(p1);
side.addColor(color);
side.addVertex(p2);
side.addColor(color);
side.addVertex(ofPoint(p1.x, p1.y, p1.z-depth));
side.addColor(color);
side.addVertex(ofPoint(p1.x, p1.y, p1.z-depth));
side.addColor(color);
side.addVertex(ofPoint(p2.x, p2.y, p2.z-depth));
side.addColor(color);
side.addVertex(p2);
side.addColor(color);
}
return side;
}