void Circle3DOverlay::render(RenderArgs* args) {
    if (!_visible) {
        return; // do nothing if we're not visible
    }

    float alpha = getAlpha();
    if (alpha == 0.0f) {
        return; // do nothing if our alpha is 0, we're not visible
    }

    bool geometryChanged = _dirty;
    _dirty = false;

    const float FULL_CIRCLE = 360.0f;
    const float SLICES = 180.0f;  // The amount of segment to create the circle
    const float SLICE_ANGLE = FULL_CIRCLE / SLICES;
    const float MAX_COLOR = 255.0f;

    auto geometryCache = DependencyManager::get<GeometryCache>();

    Q_ASSERT(args->_batch);
    auto& batch = *args->_batch;
    if (args->_pipeline) {
        batch.setPipeline(args->_pipeline->pipeline);
    }

    // FIXME: THe line width of _lineWidth is not supported anymore, we ll need a workaround

    auto transform = getTransform();
    transform.postScale(glm::vec3(getDimensions(), 1.0f));
    batch.setModelTransform(transform);

    // for our overlay, is solid means we draw a ring between the inner and outer radius of the circle, otherwise
    // we just draw a line...
    if (getIsSolid()) {
        if (!_quadVerticesID) {
            _quadVerticesID = geometryCache->allocateID();
        }

        if (geometryChanged) {
            QVector<glm::vec2> points;
            QVector<glm::vec4> colors;

            float pulseLevel = updatePulse();
            vec4 pulseModifier = vec4(1);
            if (_alphaPulse != 0.0f) {
                pulseModifier.a = (_alphaPulse >= 0.0f) ? pulseLevel : (1.0f - pulseLevel);
            }
            if (_colorPulse != 0.0f) {
                float pulseValue = (_colorPulse >= 0.0f) ? pulseLevel : (1.0f - pulseLevel);
                pulseModifier = vec4(vec3(pulseValue), pulseModifier.a);
            }
            vec4 innerStartColor = vec4(toGlm(_innerStartColor), _innerStartAlpha) * pulseModifier;
            vec4 outerStartColor = vec4(toGlm(_outerStartColor), _outerStartAlpha) * pulseModifier;
            vec4 innerEndColor = vec4(toGlm(_innerEndColor), _innerEndAlpha) * pulseModifier;
            vec4 outerEndColor = vec4(toGlm(_outerEndColor), _outerEndAlpha) * pulseModifier;

            if (_innerRadius <= 0) {
                _solidPrimitive = gpu::TRIANGLE_FAN;
                points << vec2();
                colors << innerStartColor;
                for (float angle = _startAt; angle <= _endAt; angle += SLICE_ANGLE) {
                    float range = (angle - _startAt) / (_endAt - _startAt);
                    float angleRadians = glm::radians(angle);
                    points << glm::vec2(cosf(angleRadians) * _outerRadius, sinf(angleRadians) * _outerRadius);
                    colors << glm::mix(outerStartColor, outerEndColor, range);
                }
            } else {
                _solidPrimitive = gpu::TRIANGLE_STRIP;
                for (float angle = _startAt; angle <= _endAt; angle += SLICE_ANGLE) {
                    float range = (angle - _startAt) / (_endAt - _startAt);

                    float angleRadians = glm::radians(angle);
                    points << glm::vec2(cosf(angleRadians) * _innerRadius, sinf(angleRadians) * _innerRadius);
                    colors << glm::mix(innerStartColor, innerEndColor, range);

                    points << glm::vec2(cosf(angleRadians) * _outerRadius, sinf(angleRadians) * _outerRadius);
                    colors << glm::mix(outerStartColor, outerEndColor, range);
                }
            }
            geometryCache->updateVertices(_quadVerticesID, points, colors);
        }
        
        geometryCache->renderVertices(batch, _solidPrimitive, _quadVerticesID);
        
    } else {
        if (!_lineVerticesID) {
            _lineVerticesID = geometryCache->allocateID();
        }
        
        if (geometryChanged) {
            QVector<glm::vec2> points;
            
            float angle = _startAt;
            float angleInRadians = glm::radians(angle);
            glm::vec2 firstPoint(cosf(angleInRadians) * _outerRadius, sinf(angleInRadians) * _outerRadius);
            points << firstPoint;
            
            while (angle < _endAt) {
                angle += SLICE_ANGLE;
                angleInRadians = glm::radians(angle);
                glm::vec2 thisPoint(cosf(angleInRadians) * _outerRadius, sinf(angleInRadians) * _outerRadius);
                points << thisPoint;
                
                if (getIsDashedLine()) {
                    angle += SLICE_ANGLE / 2.0f; // short gap
                    angleInRadians = glm::radians(angle);
                    glm::vec2 dashStartPoint(cosf(angleInRadians) * _outerRadius, sinf(angleInRadians) * _outerRadius);
                    points << dashStartPoint;
                }
            }
            
            // get the last slice portion....
            angle = _endAt;
            angleInRadians = glm::radians(angle);
            glm::vec2 lastPoint(cosf(angleInRadians) * _outerRadius, sinf(angleInRadians) * _outerRadius);
            points << lastPoint;
            geometryCache->updateVertices(_lineVerticesID, points, vec4(toGlm(getColor()), getAlpha()));
        }
        
        if (getIsDashedLine()) {
            geometryCache->renderVertices(batch, gpu::LINES, _lineVerticesID);
        } else {
            geometryCache->renderVertices(batch, gpu::LINE_STRIP, _lineVerticesID);
        }
    }
    
    // draw our tick marks
    // for our overlay, is solid means we draw a ring between the inner and outer radius of the circle, otherwise
    // we just draw a line...
    if (getHasTickMarks()) {
        
        if (_majorTicksVerticesID == GeometryCache::UNKNOWN_ID) {
            _majorTicksVerticesID = geometryCache->allocateID();
        }
        if (_minorTicksVerticesID == GeometryCache::UNKNOWN_ID) {
            _minorTicksVerticesID = geometryCache->allocateID();
        }
        
        if (geometryChanged) {
            QVector<glm::vec2> majorPoints;
            QVector<glm::vec2> minorPoints;
            
            // draw our major tick marks
            if (getMajorTickMarksAngle() > 0.0f && getMajorTickMarksLength() != 0.0f) {
                
                float tickMarkAngle = getMajorTickMarksAngle();
                float angle = _startAt - fmodf(_startAt, tickMarkAngle) + tickMarkAngle;
                float angleInRadians = glm::radians(angle);
                float tickMarkLength = getMajorTickMarksLength();
                float startRadius = (tickMarkLength > 0.0f) ? _innerRadius : _outerRadius;
                float endRadius = startRadius + tickMarkLength;
                
                while (angle <= _endAt) {
                    angleInRadians = glm::radians(angle);
                    
                    glm::vec2 thisPointA(cosf(angleInRadians) * startRadius, sinf(angleInRadians) * startRadius);
                    glm::vec2 thisPointB(cosf(angleInRadians) * endRadius, sinf(angleInRadians) * endRadius);
                    
                    majorPoints << thisPointA << thisPointB;
                    
                    angle += tickMarkAngle;
                }
            }
            
            // draw our minor tick marks
            if (getMinorTickMarksAngle() > 0.0f && getMinorTickMarksLength() != 0.0f) {
                
                float tickMarkAngle = getMinorTickMarksAngle();
                float angle = _startAt - fmodf(_startAt, tickMarkAngle) + tickMarkAngle;
                float angleInRadians = glm::radians(angle);
                float tickMarkLength = getMinorTickMarksLength();
                float startRadius = (tickMarkLength > 0.0f) ? _innerRadius : _outerRadius;
                float endRadius = startRadius + tickMarkLength;
                
                while (angle <= _endAt) {
                    angleInRadians = glm::radians(angle);
                    
                    glm::vec2 thisPointA(cosf(angleInRadians) * startRadius, sinf(angleInRadians) * startRadius);
                    glm::vec2 thisPointB(cosf(angleInRadians) * endRadius, sinf(angleInRadians) * endRadius);
                    
                    minorPoints << thisPointA << thisPointB;
                    
                    angle += tickMarkAngle;
                }
            }
            
            xColor majorColorX = getMajorTickMarksColor();
            glm::vec4 majorColor(majorColorX.red / MAX_COLOR, majorColorX.green / MAX_COLOR, majorColorX.blue / MAX_COLOR, alpha);
            
            geometryCache->updateVertices(_majorTicksVerticesID, majorPoints, majorColor);
            
            xColor minorColorX = getMinorTickMarksColor();
            glm::vec4 minorColor(minorColorX.red / MAX_COLOR, minorColorX.green / MAX_COLOR, minorColorX.blue / MAX_COLOR, alpha);
            
            geometryCache->updateVertices(_minorTicksVerticesID, minorPoints, minorColor);
        }
        
        geometryCache->renderVertices(batch, gpu::LINES, _majorTicksVerticesID);
        
        geometryCache->renderVertices(batch, gpu::LINES, _minorTicksVerticesID);
    }
}
Beispiel #2
0
void Circle3DOverlay::render(RenderArgs* args) {
    if (!_visible) {
        return; // do nothing if we're not visible
    }

    float alpha = getAlpha();

    if (alpha == 0.0f) {
        return; // do nothing if our alpha is 0, we're not visible
    }

    // Create the circle in the coordinates origin
    float outerRadius = getOuterRadius();
    float innerRadius = getInnerRadius(); // only used in solid case
    float startAt = getStartAt();
    float endAt = getEndAt();

    bool geometryChanged = (startAt != _lastStartAt || endAt != _lastEndAt ||
                                innerRadius != _lastInnerRadius || outerRadius != _lastOuterRadius);


    const float FULL_CIRCLE = 360.0f;
    const float SLICES = 180.0f;  // The amount of segment to create the circle
    const float SLICE_ANGLE = FULL_CIRCLE / SLICES;

    //const int slices = 15;
    xColor colorX = getColor();
    const float MAX_COLOR = 255.0f;
    glm::vec4 color(colorX.red / MAX_COLOR, colorX.green / MAX_COLOR, colorX.blue / MAX_COLOR, alpha);

    bool colorChanged = colorX.red != _lastColor.red || colorX.green != _lastColor.green || colorX.blue != _lastColor.blue;
    _lastColor = colorX;

    auto geometryCache = DependencyManager::get<GeometryCache>();
    
    Q_ASSERT(args->_batch);
    auto& batch = *args->_batch;
    batch._glLineWidth(_lineWidth);
    
    auto transform = _transform;
    transform.postScale(glm::vec3(getDimensions(), 1.0f));
    batch.setModelTransform(transform);
    DependencyManager::get<DeferredLightingEffect>()->bindSimpleProgram(batch, false, false);
    
    // for our overlay, is solid means we draw a ring between the inner and outer radius of the circle, otherwise
    // we just draw a line...
    if (getIsSolid()) {
        if (_quadVerticesID == GeometryCache::UNKNOWN_ID) {
            _quadVerticesID = geometryCache->allocateID();
        }
        
        if (geometryChanged || colorChanged) {
            
            QVector<glm::vec2> points;
            
            float angle = startAt;
            float angleInRadians = glm::radians(angle);
            glm::vec2 mostRecentInnerPoint(cosf(angleInRadians) * innerRadius, sinf(angleInRadians) * innerRadius);
            glm::vec2 mostRecentOuterPoint(cosf(angleInRadians) * outerRadius, sinf(angleInRadians) * outerRadius);
            
            while (angle < endAt) {
                angleInRadians = glm::radians(angle);
                glm::vec2 thisInnerPoint(cosf(angleInRadians) * innerRadius, sinf(angleInRadians) * innerRadius);
                glm::vec2 thisOuterPoint(cosf(angleInRadians) * outerRadius, sinf(angleInRadians) * outerRadius);
                
                points << mostRecentInnerPoint << mostRecentOuterPoint << thisOuterPoint; // first triangle
                points << mostRecentInnerPoint << thisInnerPoint << thisOuterPoint; // second triangle
                
                angle += SLICE_ANGLE;

                mostRecentInnerPoint = thisInnerPoint;
                mostRecentOuterPoint = thisOuterPoint;
            }
            
            // get the last slice portion....
            angle = endAt;
            angleInRadians = glm::radians(angle);
            glm::vec2 lastInnerPoint(cosf(angleInRadians) * innerRadius, sinf(angleInRadians) * innerRadius);
            glm::vec2 lastOuterPoint(cosf(angleInRadians) * outerRadius, sinf(angleInRadians) * outerRadius);

            points << mostRecentInnerPoint << mostRecentOuterPoint << lastOuterPoint; // first triangle
            points << mostRecentInnerPoint << lastInnerPoint << lastOuterPoint; // second triangle
            
            geometryCache->updateVertices(_quadVerticesID, points, color);
        }
        
        geometryCache->renderVertices(batch, gpu::TRIANGLES, _quadVerticesID);
        
    } else {
        if (_lineVerticesID == GeometryCache::UNKNOWN_ID) {
            _lineVerticesID = geometryCache->allocateID();
        }
        
        if (geometryChanged || colorChanged) {
            QVector<glm::vec2> points;
            
            float angle = startAt;
            float angleInRadians = glm::radians(angle);
            glm::vec2 firstPoint(cosf(angleInRadians) * outerRadius, sinf(angleInRadians) * outerRadius);
            points << firstPoint;
            
            while (angle < endAt) {
                angle += SLICE_ANGLE;
                angleInRadians = glm::radians(angle);
                glm::vec2 thisPoint(cosf(angleInRadians) * outerRadius, sinf(angleInRadians) * outerRadius);
                points << thisPoint;
                
                if (getIsDashedLine()) {
                    angle += SLICE_ANGLE / 2.0f; // short gap
                    angleInRadians = glm::radians(angle);
                    glm::vec2 dashStartPoint(cosf(angleInRadians) * outerRadius, sinf(angleInRadians) * outerRadius);
                    points << dashStartPoint;
                }
            }
            
            // get the last slice portion....
            angle = endAt;
            angleInRadians = glm::radians(angle);
            glm::vec2 lastPoint(cosf(angleInRadians) * outerRadius, sinf(angleInRadians) * outerRadius);
            points << lastPoint;
            
            geometryCache->updateVertices(_lineVerticesID, points, color);
        }
        
        if (getIsDashedLine()) {
            geometryCache->renderVertices(batch, gpu::LINES, _lineVerticesID);
        } else {
            geometryCache->renderVertices(batch, gpu::LINE_STRIP, _lineVerticesID);
        }
    }
    
    // draw our tick marks
    // for our overlay, is solid means we draw a ring between the inner and outer radius of the circle, otherwise
    // we just draw a line...
    if (getHasTickMarks()) {
        
        if (_majorTicksVerticesID == GeometryCache::UNKNOWN_ID) {
            _majorTicksVerticesID = geometryCache->allocateID();
        }
        if (_minorTicksVerticesID == GeometryCache::UNKNOWN_ID) {
            _minorTicksVerticesID = geometryCache->allocateID();
        }
        
        if (geometryChanged) {
            QVector<glm::vec2> majorPoints;
            QVector<glm::vec2> minorPoints;
            
            // draw our major tick marks
            if (getMajorTickMarksAngle() > 0.0f && getMajorTickMarksLength() != 0.0f) {
                
                float tickMarkAngle = getMajorTickMarksAngle();
                float angle = startAt - fmodf(startAt, tickMarkAngle) + tickMarkAngle;
                float angleInRadians = glm::radians(angle);
                float tickMarkLength = getMajorTickMarksLength();
                float startRadius = (tickMarkLength > 0.0f) ? innerRadius : outerRadius;
                float endRadius = startRadius + tickMarkLength;
                
                while (angle <= endAt) {
                    angleInRadians = glm::radians(angle);
                    
                    glm::vec2 thisPointA(cosf(angleInRadians) * startRadius, sinf(angleInRadians) * startRadius);
                    glm::vec2 thisPointB(cosf(angleInRadians) * endRadius, sinf(angleInRadians) * endRadius);
                    
                    majorPoints << thisPointA << thisPointB;
                    
                    angle += tickMarkAngle;
                }
            }
            
            // draw our minor tick marks
            if (getMinorTickMarksAngle() > 0.0f && getMinorTickMarksLength() != 0.0f) {
                
                float tickMarkAngle = getMinorTickMarksAngle();
                float angle = startAt - fmodf(startAt, tickMarkAngle) + tickMarkAngle;
                float angleInRadians = glm::radians(angle);
                float tickMarkLength = getMinorTickMarksLength();
                float startRadius = (tickMarkLength > 0.0f) ? innerRadius : outerRadius;
                float endRadius = startRadius + tickMarkLength;
                
                while (angle <= endAt) {
                    angleInRadians = glm::radians(angle);
                    
                    glm::vec2 thisPointA(cosf(angleInRadians) * startRadius, sinf(angleInRadians) * startRadius);
                    glm::vec2 thisPointB(cosf(angleInRadians) * endRadius, sinf(angleInRadians) * endRadius);
                    
                    minorPoints << thisPointA << thisPointB;
                    
                    angle += tickMarkAngle;
                }
            }
            
            xColor majorColorX = getMajorTickMarksColor();
            glm::vec4 majorColor(majorColorX.red / MAX_COLOR, majorColorX.green / MAX_COLOR, majorColorX.blue / MAX_COLOR, alpha);
            
            geometryCache->updateVertices(_majorTicksVerticesID, majorPoints, majorColor);
            
            xColor minorColorX = getMinorTickMarksColor();
            glm::vec4 minorColor(minorColorX.red / MAX_COLOR, minorColorX.green / MAX_COLOR, minorColorX.blue / MAX_COLOR, alpha);
            
            geometryCache->updateVertices(_minorTicksVerticesID, minorPoints, minorColor);
        }
        
        geometryCache->renderVertices(batch, gpu::LINES, _majorTicksVerticesID);
        
        geometryCache->renderVertices(batch, gpu::LINES, _minorTicksVerticesID);
    }
    
    if (geometryChanged) {
        _lastStartAt = startAt;
        _lastEndAt = endAt;
        _lastInnerRadius = innerRadius;
        _lastOuterRadius = outerRadius;
    }
}
Beispiel #3
0
void Circle3DOverlay::render(RenderArgs* args) {
    if (!_visible) {
        return; // do nothing if we're not visible
    }

    float alpha = getAlpha();

    if (alpha == 0.0) {
        return; // do nothing if our alpha is 0, we're not visible
    }
    
    // Create the circle in the coordinates origin
    float outerRadius = getOuterRadius();
    float innerRadius = getInnerRadius(); // only used in solid case
    float startAt = getStartAt();
    float endAt = getEndAt();
    
    bool geometryChanged = (startAt != _lastStartAt || endAt != _lastEndAt ||
                                innerRadius != _lastInnerRadius || outerRadius != _lastOuterRadius);

    
    const float FULL_CIRCLE = 360.0f;
    const float SLICES = 180.0f;  // The amount of segment to create the circle
    const float SLICE_ANGLE = FULL_CIRCLE / SLICES;

    //const int slices = 15;
    xColor colorX = getColor();
    const float MAX_COLOR = 255.0f;
    glm::vec4 color(colorX.red / MAX_COLOR, colorX.green / MAX_COLOR, colorX.blue / MAX_COLOR, alpha);

    bool colorChanged = colorX.red != _lastColor.red || colorX.green != _lastColor.green || colorX.blue != _lastColor.blue;
    _lastColor = colorX;

    glDisable(GL_LIGHTING);
    
    glm::vec3 position = getPosition();
    glm::vec3 center = getCenter();
    glm::vec2 dimensions = getDimensions();
    glm::quat rotation = getRotation();

    float glowLevel = getGlowLevel();
    Glower* glower = NULL;
    if (glowLevel > 0.0f) {
        glower = new Glower(glowLevel);
    }

    glPushMatrix();
        glTranslatef(position.x, position.y, position.z);
        glm::vec3 axis = glm::axis(rotation);
        glRotatef(glm::degrees(glm::angle(rotation)), axis.x, axis.y, axis.z);
        glPushMatrix();
            glm::vec3 positionToCenter = center - position;
            glTranslatef(positionToCenter.x, positionToCenter.y, positionToCenter.z);
            glScalef(dimensions.x / 2.0f, dimensions.y / 2.0f, 1.0f);

            glLineWidth(_lineWidth);

            auto geometryCache = DependencyManager::get<GeometryCache>();
            
            // for our overlay, is solid means we draw a ring between the inner and outer radius of the circle, otherwise
            // we just draw a line...
            if (getIsSolid()) {
                if (_quadVerticesID == GeometryCache::UNKNOWN_ID) {
                    _quadVerticesID = geometryCache->allocateID();
                }
                
                if (geometryChanged || colorChanged) {
                    
                    QVector<glm::vec2> points;

                    float angle = startAt;
                    float angleInRadians = glm::radians(angle);
                    glm::vec2 firstInnerPoint(cos(angleInRadians) * innerRadius, sin(angleInRadians) * innerRadius);
                    glm::vec2 firstOuterPoint(cos(angleInRadians) * outerRadius, sin(angleInRadians) * outerRadius);

                    points << firstInnerPoint << firstOuterPoint;

                    while (angle < endAt) {
                        angleInRadians = glm::radians(angle);
                        glm::vec2 thisInnerPoint(cos(angleInRadians) * innerRadius, sin(angleInRadians) * innerRadius);
                        glm::vec2 thisOuterPoint(cos(angleInRadians) * outerRadius, sin(angleInRadians) * outerRadius);

                        points << thisOuterPoint << thisInnerPoint;
                
                        angle += SLICE_ANGLE;
                    }
            
                    // get the last slice portion....
                    angle = endAt;
                    angleInRadians = glm::radians(angle);
                    glm::vec2 lastInnerPoint(cos(angleInRadians) * innerRadius, sin(angleInRadians) * innerRadius);
                    glm::vec2 lastOuterPoint(cos(angleInRadians) * outerRadius, sin(angleInRadians) * outerRadius);
            
                    points << lastOuterPoint << lastInnerPoint;

                    geometryCache->updateVertices(_quadVerticesID, points, color);
                }
                
                geometryCache->renderVertices(gpu::QUAD_STRIP, _quadVerticesID);

            } else {
                if (_lineVerticesID == GeometryCache::UNKNOWN_ID) {
                    _lineVerticesID = geometryCache->allocateID();
                }

                if (geometryChanged || colorChanged) {
                    QVector<glm::vec2> points;
                    
                    float angle = startAt;
                    float angleInRadians = glm::radians(angle);
                    glm::vec2 firstPoint(cos(angleInRadians) * outerRadius, sin(angleInRadians) * outerRadius);
                    points << firstPoint;

                    while (angle < endAt) {
                        angle += SLICE_ANGLE;
                        angleInRadians = glm::radians(angle);
                        glm::vec2 thisPoint(cos(angleInRadians) * outerRadius, sin(angleInRadians) * outerRadius);
                        points << thisPoint;

                        if (getIsDashedLine()) {
                            angle += SLICE_ANGLE / 2.0f; // short gap
                            angleInRadians = glm::radians(angle);
                            glm::vec2 dashStartPoint(cos(angleInRadians) * outerRadius, sin(angleInRadians) * outerRadius);
                            points << dashStartPoint;
                        }
                    }
            
                    // get the last slice portion....
                    angle = endAt;
                    angleInRadians = glm::radians(angle);
                    glm::vec2 lastPoint(cos(angleInRadians) * outerRadius, sin(angleInRadians) * outerRadius);
                    points << lastPoint;

                    geometryCache->updateVertices(_lineVerticesID, points, color);
                }

                if (getIsDashedLine()) {
                    geometryCache->renderVertices(gpu::LINES, _lineVerticesID);
                } else {
                    geometryCache->renderVertices(gpu::LINE_STRIP, _lineVerticesID);
                }
            }
            
            // draw our tick marks
            // for our overlay, is solid means we draw a ring between the inner and outer radius of the circle, otherwise
            // we just draw a line...
            if (getHasTickMarks()) {

                if (_majorTicksVerticesID == GeometryCache::UNKNOWN_ID) {
                    _majorTicksVerticesID = geometryCache->allocateID();
                }
                if (_minorTicksVerticesID == GeometryCache::UNKNOWN_ID) {
                    _minorTicksVerticesID = geometryCache->allocateID();
                }

                if (geometryChanged) {
                    QVector<glm::vec2> majorPoints;
                    QVector<glm::vec2> minorPoints;

                    // draw our major tick marks
                    if (getMajorTickMarksAngle() > 0.0f && getMajorTickMarksLength() != 0.0f) {
                
                        float tickMarkAngle = getMajorTickMarksAngle();
                        float angle = startAt - fmod(startAt, tickMarkAngle) + tickMarkAngle; 
                        float angleInRadians = glm::radians(angle);
                        float tickMarkLength = getMajorTickMarksLength();
                        float startRadius = (tickMarkLength > 0.0f) ? innerRadius : outerRadius;
                        float endRadius = startRadius + tickMarkLength;

                        while (angle <= endAt) {
                            angleInRadians = glm::radians(angle);

                            glm::vec2 thisPointA(cos(angleInRadians) * startRadius, sin(angleInRadians) * startRadius);
                            glm::vec2 thisPointB(cos(angleInRadians) * endRadius, sin(angleInRadians) * endRadius);

                            majorPoints << thisPointA << thisPointB;
                
                            angle += tickMarkAngle;
                        }
                    }

                    // draw our minor tick marks
                    if (getMinorTickMarksAngle() > 0.0f && getMinorTickMarksLength() != 0.0f) {
                
                        float tickMarkAngle = getMinorTickMarksAngle();
                        float angle = startAt - fmod(startAt, tickMarkAngle) + tickMarkAngle; 
                        float angleInRadians = glm::radians(angle);
                        float tickMarkLength = getMinorTickMarksLength();
                        float startRadius = (tickMarkLength > 0.0f) ? innerRadius : outerRadius;
                        float endRadius = startRadius + tickMarkLength;

                        while (angle <= endAt) {
                            angleInRadians = glm::radians(angle);

                            glm::vec2 thisPointA(cos(angleInRadians) * startRadius, sin(angleInRadians) * startRadius);
                            glm::vec2 thisPointB(cos(angleInRadians) * endRadius, sin(angleInRadians) * endRadius);

                            minorPoints << thisPointA << thisPointB;
                
                            angle += tickMarkAngle;
                        }
                    }

                    xColor majorColorX = getMajorTickMarksColor();
                    glm::vec4 majorColor(majorColorX.red / MAX_COLOR, majorColorX.green / MAX_COLOR, majorColorX.blue / MAX_COLOR, alpha);

                    geometryCache->updateVertices(_majorTicksVerticesID, majorPoints, majorColor);

                    xColor minorColorX = getMinorTickMarksColor();
                    glm::vec4 minorColor(minorColorX.red / MAX_COLOR, minorColorX.green / MAX_COLOR, minorColorX.blue / MAX_COLOR, alpha);

                    geometryCache->updateVertices(_minorTicksVerticesID, minorPoints, minorColor);
                }

                geometryCache->renderVertices(gpu::LINES, _majorTicksVerticesID);

                geometryCache->renderVertices(gpu::LINES, _minorTicksVerticesID);
            }
            
 
        glPopMatrix();
    glPopMatrix();
    
    if (geometryChanged) {
        _lastStartAt = startAt;
        _lastEndAt = endAt;
        _lastInnerRadius = innerRadius;
        _lastOuterRadius = outerRadius;
    }
    
    if (glower) {
        delete glower;
    }
}