paysages3d/src/definition/PaintedGridBrush.cpp

73 lines
2.7 KiB
C++

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