100 lines
3.1 KiB
C++
100 lines
3.1 KiB
C++
#pragma once
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#include "definition_global.h"
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namespace paysages {
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namespace definition {
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/**
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* Base class for brushes that can be used to paint values on a PaintedGrid.
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*/
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class DEFINITIONSHARED_EXPORT PaintedGridBrush {
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public:
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PaintedGridBrush(double hard_radius, double smoothed_size, double total_radius);
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/**
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* Get the rectangle area potentially covered by this brush.
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*/
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void getArea(double x, double y, int *xstart, int *ystart, int *xend, int *yend) const;
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/**
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* Get the brush influence for coordinates relative to its center.
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*/
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double getInfluence(double dx, double dy) const;
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/**
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* Abstract method to reimplement to get the final value of a brush stroke at a given point.
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*/
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virtual double getValue(const PaintedGrid *grid, double x, double y, double basevalue, double influence,
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double force) const;
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protected:
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double hard_radius;
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double smoothed_size;
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double total_radius;
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};
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/**
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* Brush able to raise or lower the grid value.
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*/
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class DEFINITIONSHARED_EXPORT PaintedGridBrushRaiseLower : public PaintedGridBrush {
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public:
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PaintedGridBrushRaiseLower(const PaintedGridBrush &brush) : PaintedGridBrush(brush) {
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}
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double getValue(const PaintedGrid *grid, double x, double z, double basevalue, double influence,
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double force) const override;
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};
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/**
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* Brush able to smooth the value in an area.
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*/
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class DEFINITIONSHARED_EXPORT PaintedGridBrushSmooth : public PaintedGridBrush {
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public:
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PaintedGridBrushSmooth(const PaintedGridBrush &brush) : PaintedGridBrush(brush) {
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}
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double getValue(const PaintedGrid *grid, double x, double z, double basevalue, double influence,
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double force) const override;
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};
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/**
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* Brush able to add random fractal noise.
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*/
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class DEFINITIONSHARED_EXPORT PaintedGridBrushAddNoise : public PaintedGridBrush {
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public:
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PaintedGridBrushAddNoise(const PaintedGridBrush &brush, NoiseGenerator *generator)
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: PaintedGridBrush(brush), generator(generator) {
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}
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double getValue(const PaintedGrid *grid, double x, double z, double basevalue, double influence,
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double force) const override;
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private:
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NoiseGenerator *generator;
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};
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/**
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* Brush able to reset to initial value.
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*/
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class DEFINITIONSHARED_EXPORT PaintedGridBrushReset : public PaintedGridBrush {
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public:
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PaintedGridBrushReset(const PaintedGridBrush &brush) : PaintedGridBrush(brush) {
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}
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double getValue(const PaintedGrid *grid, double x, double z, double basevalue, double influence,
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double force) const override;
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};
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/**
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* Brush able to flatten to a specific value.
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*/
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class DEFINITIONSHARED_EXPORT PaintedGridBrushFlatten : public PaintedGridBrush {
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public:
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PaintedGridBrushFlatten(const PaintedGridBrush &brush, double target) : PaintedGridBrush(brush), target(target) {
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}
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double getValue(const PaintedGrid *grid, double x, double z, double basevalue, double influence,
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double force) const override;
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private:
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double target;
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};
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}
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}
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