ofxLabParticleSystem/VectorField.h at master · adenine/ofxLabParticleSystem · GitHub

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#ifndef _VECTORFIELD
#define _VECTORFIELD

/*
 *  VectorField.h
 *  openFrameworks
 *
 *  Created by Joshua Walton on 12/7/08.
 *  Copyright 2008 __MyCompanyName__. All rights reserved.
 *
 */

#include "ofMain.h"
#include "ofxVectorMath.h"

//#define OF_ADDON_USING_OFXVECTORMATH
//#include "ofAddons.h"

class VectorField {

    public:

		// the internal dimensions of the field:    (ie, 60x40, etc)
        int fieldWidth;
        int fieldHeight;
		int fieldSize;   // total number of "pixels", ie w * h

		// the external dimensions of the field:   (ie, 1024x768)
		int externalWidth;
		int externalHeight;

        vector <ofxVec2f> field;

        VectorField();
        virtual ~VectorField();

		void setupField(int innerW, int innerH, int outerW, int outerH);   // pass in internal dimensions and outer dimensions

        void clear();
        void fadeField(float fadeAmount);
        void randomizeField(float scale);
        void draw();

		ofxVec2f	getForceFromPos(float xpos, float ypos);

        void addOutwardCircle(float x, float y, float radius, float strength);
        void addInwardCircle(float x, float y, float radius, float strength);
        void addClockwiseCircle(float x, float y, float radius, float strength);
        void addCounterClockwiseCircle(float x, float y, float radius, float strength);
        void addVectorCircle(float x, float y, float vx, float vy, float radius, float strength);

    protected:
    private:
};

#endif