CircleBrush.hpp

#if !defined(__CIRCLE_BRUSH__)
#define __CIRCLE_BRUSH__
#include "ImpBrush.h"
#include "gl_helper.h"
#include "impressionistDoc.h"
#include "impressionistUI.h"

using namespace GLHelper;

class CircleBrush : public ImpBrush {
public:
  double radius = 0;
  CircleBrush(ImpressionistDoc *pDoc = NULL, char *name = NULL)
      : ImpBrush(pDoc, name) {}

  void BrushBegin(const Point source, const Point target, int rad, GLubyte* color) {
    ImpressionistDoc *pDoc = GetDocument();
    ImpressionistUI *dlg = pDoc->m_pUI;
    float size = (rad > 0) ? rad : pDoc->getSize();

    glPointSize((float)size);

    BrushMove(source, target, color);
  }
  void BrushMove(const Point source, const Point target, GLubyte* color = nullptr, bool randomize = false) {
    ImpressionistDoc *pDoc = GetDocument();
    if (source.x <= 0 || source.x >= pDoc->m_nPaintWidth || source.y <= 0 ||
        source.y >= pDoc->m_nPaintHeight) {
      return;
    }
    radius = pDoc->getSize() / 2.0;
    if (randomize && frand() >= 0.75)
      RandomizeAttributes();

    gl_draw_shape(GL_POLYGON, [&] {
        if (color) {
            glColor4ubv(color);
        }
        else SetColor(source);
      for (double i = 0; i <= 2 * M_PI; i += 0.1) {
        double dx = cos(i) * radius;
        double dy = sin(i) * radius;

        gl_set_point(target.x + dx, target.y + dy);
      }
    });

    pDoc->force_update_canvas();
  }
  void BrushEnd(const Point source, const Point target) {}
  void RandomizeAttributes() {
    int size = pDoc->m_pUI->getSize();
    radius = irand(size + 5);
  }
  void select() {
    ImpressionistDoc *pDoc = GetDocument();
    pDoc->m_pUI->m_BrushWidthSlider->deactivate();
    pDoc->m_pUI->m_BrushAngleSlider->deactivate();
    pDoc->m_pUI->m_StrokeDirection->deactivate();
    pDoc->m_pUI->m_BrushSizeSlider->activate();
    pDoc->m_pUI->m_BrushAlphaSlider->activate();
    pDoc->m_pUI->m_BrushBlurSlider->deactivate();
    pDoc->m_pUI->m_ColorBlending->activate();
    pDoc->m_pUI->m_MultiResPaint->activate();
    pDoc->m_pUI->m_BrushCurvatureSlider->deactivate();
  }
};

#endif // __CIRCLE_BRUSH__