paysages3d/src/definition/Zone.cpp

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#include "Zone.h"
#include <cstring>
#include "Curve.h"
#include "PackStream.h"
#include "Vector3.h"
#define MAX_CIRCLES 10
namespace paysages {
namespace definition {
class Circle
{
public:
double value;
double centerx;
double centerz;
double softradius;
double hardradius;
};
}
}
Zone::Zone(BaseDefinition *parent):
BaseDefinition(parent)
{
value_by_height = new Curve;
absolute_height = 1;
value_by_height->setDefault(1.0);
value_by_slope = new Curve;
value_by_slope->setDefault(1.0);
circles_included_count = 0;
circles_included = new Circle[MAX_CIRCLES];
}
Zone::~Zone()
{
delete value_by_height;
delete value_by_slope;
delete circles_included;
}
void Zone::save(PackStream* stream) const
{
int i;
stream->write(&absolute_height);
stream->write(&relative_height_min);
stream->write(&relative_height_middle);
stream->write(&relative_height_max);
value_by_height->save(stream);
value_by_slope->save(stream);
stream->write(&circles_included_count);
for (i = 0; i < circles_included_count; i++)
{
stream->write(&circles_included[i].value);
stream->write(&circles_included[i].centerx);
stream->write(&circles_included[i].centerz);
stream->write(&circles_included[i].softradius);
stream->write(&circles_included[i].hardradius);
}
}
void Zone::load(PackStream* stream)
{
int i;
stream->read(&absolute_height);
stream->read(&relative_height_min);
stream->read(&relative_height_middle);
stream->read(&relative_height_max);
value_by_height->load(stream);
value_by_slope->load(stream);
stream->read(&circles_included_count);
for (i = 0; i < circles_included_count; i++)
{
stream->read(&circles_included[i].value);
stream->read(&circles_included[i].centerx);
stream->read(&circles_included[i].centerz);
stream->read(&circles_included[i].softradius);
stream->read(&circles_included[i].hardradius);
}
}
void Zone::copy(BaseDefinition* _destination) const
{
Zone* destination = (Zone*)_destination;
destination->absolute_height = absolute_height;
destination->relative_height_min = relative_height_min;
destination->relative_height_middle = relative_height_middle;
destination->relative_height_max = relative_height_max;
value_by_height->copy(destination->value_by_height);
value_by_slope->copy(destination->value_by_slope);
memcpy(destination->circles_included, circles_included, sizeof(Circle) * circles_included_count);
destination->circles_included_count = circles_included_count;
}
void Zone::clear()
{
value_by_height->clear();
value_by_slope->clear();
circles_included_count = 0;
}
void Zone::setAbsoluteHeight()
{
absolute_height = 1;
}
void Zone::setRelativeHeight(double min, double middle, double max)
{
if (max < min)
{
max = min;
}
if (middle < min)
{
middle = min;
}
if (middle > max)
{
middle = max;
}
absolute_height = 0;
relative_height_min = min;
relative_height_middle = middle;
relative_height_max = max;
}
void Zone::includeCircleArea(double value, double centerx, double centerz, double softradius, double hardradius)
{
Circle circle = {value, centerx, centerz, softradius, hardradius};
if (circles_included_count < MAX_CIRCLES)
{
circles_included[circles_included_count++] = circle;
}
}
void Zone::getHeightCurve(Curve* curve) const
{
value_by_height->copy(curve);
}
void Zone::setHeightCurve(Curve* curve)
{
curve->copy(value_by_height);
}
void Zone::addHeightRangeQuick(double value, double hardmin, double softmin, double softmax, double hardmax)
{
value_by_height->addPoint(hardmin, 0.0);
value_by_height->addPoint(softmin, value);
value_by_height->addPoint(softmax, value);
value_by_height->addPoint(hardmax, 0.0);
}
void Zone::getSlopeCurve(Curve* curve) const
{
value_by_slope->copy(curve);
}
void Zone::setSlopeCurve(Curve* curve)
{
curve->copy(value_by_slope);
}
void Zone::addSlopeRangeQuick(double value, double hardmin, double softmin, double softmax, double hardmax)
{
value_by_slope->addPoint(hardmin, 0.0);
value_by_slope->addPoint(softmin, value);
value_by_slope->addPoint(softmax, value);
value_by_slope->addPoint(hardmax, 0.0);
}
static inline double _getCircleInfluence(const Circle &circle, const Vector3 &position)
{
double radius, dx, dz;
dx = position.x - circle.centerx;
dz = position.z - circle.centerz;
radius = sqrt(dx * dx + dz * dz);
if (radius > circle.hardradius)
{
return 0.0;
}
else if (radius < circle.softradius)
{
return circle.value;
}
else
{
return circle.value * (circle.hardradius - radius) / (circle.hardradius - circle.softradius);
}
}
double Zone::getValue(const Vector3 &location, const Vector3 &normal) const
{
int i;
double final_height;
double value, value_height, value_steepness, value_circle;
if (circles_included_count > 0)
{
value_circle = 0.0;
for (i = 0; i < circles_included_count; i++)
{
value = _getCircleInfluence(circles_included[i], location);
if (value > value_circle)
{
value_circle = value;
}
}
}
else
{
value_circle = 1.0;
}
if (absolute_height)
{
final_height = location.y;
}
else
{
if (location.y >= relative_height_max)
{
final_height = 1.0;
}
else if (location.y <= relative_height_min)
{
final_height = 0.0;
}
else if (location.y <= relative_height_middle)
{
final_height = 0.5 * (location.y - relative_height_min) / (relative_height_middle - relative_height_min);
}
else
{
final_height = 0.5 + 0.5 * (location.y - relative_height_middle) / (relative_height_max - relative_height_middle);
}
}
value_height = value_by_height->getValue(final_height);
value_steepness = value_by_slope->getValue(1.0 - normal.y);
if (value_steepness < value_height)
{
if (value_circle < value_steepness)
{
return value_circle;
}
else
{
return value_steepness;
}
}
else
{
if (value_circle < value_height)
{
return value_circle;
}
else
{
return value_height;
}
}
}