nuclear@12: /*
nuclear@12: glviewvol is an OpenGL 3D volume data viewer
nuclear@12: Copyright (C) 2014  John Tsiombikas <nuclear@member.fsf.org>
nuclear@12: 
nuclear@12: This program is free software: you can redistribute it and/or modify
nuclear@12: it under the terms of the GNU General Public License as published by
nuclear@12: the Free Software Foundation, either version 3 of the License, or
nuclear@12: (at your option) any later version.
nuclear@12: 
nuclear@12: This program is distributed in the hope that it will be useful,
nuclear@12: but WITHOUT ANY WARRANTY; without even the implied warranty of
nuclear@12: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
nuclear@12: GNU General Public License for more details.
nuclear@12: 
nuclear@12: You should have received a copy of the GNU General Public License
nuclear@12: along with this program.  If not, see <http://www.gnu.org/licenses/>.
nuclear@12: */
nuclear@6: #ifndef XFERMAP_H_
nuclear@6: #define XFERMAP_H_
nuclear@6: 
nuclear@6: class TransferFunc {
nuclear@6: public:
nuclear@6: 	virtual ~TransferFunc();
nuclear@6: 
nuclear@6: 	virtual float map(float x) const = 0;
nuclear@6: 	virtual void map(float x, float *rgba_value) const = 0;
nuclear@6: };
nuclear@6: 
nuclear@6: class TransferWindow : public TransferFunc {
nuclear@6: private:
nuclear@6: 	float soft_rad;
nuclear@7: 	float low[3], high[3];	// rgb
nuclear@6: 
nuclear@6: public:
nuclear@7: 	enum { HANDLE_LOW = 0, HANDLE_HIGH = 1};
nuclear@7: 
nuclear@6: 	TransferWindow();
nuclear@6: 
nuclear@7: 	// handle: 0 or HANDLE_LOW is low, 1 or HANDLE_HIGH is high
nuclear@7: 	// if channel == -1, change all channels simultaneously
nuclear@7: 	void set_handle(int channel, int handle, float val);
nuclear@7: 	float get_handle(int channel, int handle) const;
nuclear@7: 
nuclear@7: 	int nearest_handle(int channel, float pos) const;
nuclear@7: 
nuclear@6: 	void set_interval(float a, float b);
nuclear@6: 	void set_interval(float *rgba_low, float *rgba_high);
nuclear@6: 	void set_interval_rgba(int channel, float a, float b);
nuclear@6: 
nuclear@6: 	void get_interval(float *aptr, float *bptr) const;
nuclear@6: 	void get_interval_rgba(float *rgba_low, float *rgba_high) const;
nuclear@6: 	void get_interval_rgba(int channel, float *aptr, float *bptr) const;
nuclear@6: 
nuclear@6: 	void set_soft_radius(float s);
nuclear@6: 	float get_soft_radius() const;
nuclear@6: 
nuclear@6: 	float map(float x) const;
nuclear@6: 	void map(float x, float *rgba_value) const;
nuclear@6: };
nuclear@6: 
nuclear@6: #endif	// XFERMAP_H_