draw a rainbow ribbon (uses MeshUtils.h)

drawRibbonRainbow

deque<ofVec3f> mousePts;

void testApp::drawRibbonRainbow() {

    mousePts.push_back(ofVec3f(ofGetMouseX(), ofGetMouseY(), 0));

    ofPolyline polyPoints;
    for(int i = 0; i < mousePts.size(); i++) {
        polyPoints.addVertex(mousePts[i]);
    }

    ofPolyline smooth = polyPoints.getSmoothed(8);
    float ribbonWidth = 6;   
    float strokeSize = ribbonWidth * 4;

    // uses force to determine ribbon width
    ofMesh followMeshC = MeshUtils::getSplitMeshWithForceFromPath(smooth,strokeSize - (ribbonWidth/2), false, 1);
    ofMesh followMeshB = MeshUtils::getSplitMeshWithForceFromPath(smooth,strokeSize - (ribbonWidth/2), true, 1);
    ofMesh followMesh = MeshUtils::getMeshWithForceFromPath(smooth,strokeSize * .33 - (ribbonWidth/2), .5);

    // force doesn't affect ribbon width
    //ofMesh followMeshC = MeshUtils::getSplitMeshFromPath(smooth,strokeSize - (ribbonWidth/2), false);
    //ofMesh followMeshB = MeshUtils::getSplitMeshFromPath(smooth,strokeSize * .66 - (ribbonWidth/2), false);
    //ofMesh followMesh = MeshUtils::getSplitMeshFromPath(smooth,strokeSize * .33 - (ribbonWidth/2), false);
    
    glLineWidth(ribbonWidth);

    ofSetColor(0);
    followMeshC.drawWireframe();
    ofSetColor(0,255,255);
    followMeshC.drawFaces();
    ofSetColor(0);
    followMeshB.drawWireframe();
    ofSetColor(255,0,255);
    followMeshB.drawFaces();
    ofSetColor(0);
    followMesh.drawWireframe();
    ofSetColor(255,255,0);
    followMesh.drawFaces();

    while(doubleMousePts.size() > 200) {
        doubleMousePts.pop_front();
    }

}