74 lines
2.7 KiB
C++
74 lines
2.7 KiB
C++
#include "PaintedGridBrush.h"
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#include "NoiseGenerator.h"
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#include "PaintedGrid.h"
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#include <cmath>
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PaintedGridBrush::PaintedGridBrush(double hard_radius, double smoothed_size, double total_radius)
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: hard_radius(hard_radius), smoothed_size(smoothed_size), total_radius(total_radius) {
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}
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void PaintedGridBrush::getArea(double x, double y, int *xstart, int *ystart, int *xend, int *yend) const {
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double s = smoothed_size + hard_radius;
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*xstart = floor_to_int(x - s);
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*xend = ceil_to_int(x + s);
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*ystart = floor_to_int(y - s);
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*yend = ceil_to_int(y + s);
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}
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double PaintedGridBrush::getInfluence(double dx, double dy) const {
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double distance = sqrt(dx * dx + dy * dy);
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if (distance > hard_radius) {
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if (distance <= hard_radius + smoothed_size) {
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return 1.0 - (distance - hard_radius) / smoothed_size;
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} else {
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return 0.0;
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}
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} else {
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return 1.0;
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}
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}
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double PaintedGridBrush::getValue(const PaintedGrid *, double, double, double basevalue, double, double) const {
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return basevalue;
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}
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double PaintedGridBrushRaiseLower::getValue(const PaintedGrid *, double, double, double basevalue, double influence,
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double force) const {
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return basevalue + influence * force;
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}
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double PaintedGridBrushSmooth::getValue(const PaintedGrid *grid, double x, double y, double basevalue, double influence,
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double force) const {
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double ideal, factor;
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ideal = grid->getFinalValue((x + total_radius * 0.5), y);
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ideal += grid->getFinalValue((x - total_radius * 0.5), y);
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ideal += grid->getFinalValue(x, (y - total_radius * 0.5));
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ideal += grid->getFinalValue(x, (y + total_radius * 0.5));
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ideal /= 4.0;
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factor = influence * force;
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if (factor > 1.0) {
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factor = 0.0;
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}
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return basevalue + (ideal - basevalue) * factor;
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}
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double PaintedGridBrushAddNoise::getValue(const PaintedGrid *, double x, double y, double basevalue, double influence,
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double force) const {
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return basevalue + generator->get2DTotal(x / total_radius, y / total_radius) * influence * force * total_radius;
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}
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double PaintedGridBrushReset::getValue(const PaintedGrid *grid, double x, double y, double basevalue, double influence,
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double force) const {
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double ideal = grid->getInitialValue(x, y);
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return basevalue + (ideal - basevalue) * influence * force;
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}
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double PaintedGridBrushFlatten::getValue(const PaintedGrid *, double, double, double basevalue, double influence,
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double force) const {
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double ideal = target;
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return basevalue + (ideal - basevalue) * influence * force;
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}
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