131 lines
2.8 KiB
C++
131 lines
2.8 KiB
C++
#ifndef GODRAYSSAMPLER_H
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#define GODRAYSSAMPLER_H
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#include "software_global.h"
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namespace paysages {
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namespace software {
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/**
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* 3D sampler for "god rays".
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*/
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class SOFTWARESHARED_EXPORT GodRaysSampler {
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public:
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GodRaysSampler();
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~GodRaysSampler();
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inline const SpaceSegment &getBounds() const {
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return *bounds;
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}
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inline double getSamplingStep() const {
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return sampling_step;
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}
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inline double getMaxLength() const {
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return max_length;
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}
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inline double getWalkStep() const {
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return walk_step;
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}
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/**
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* Prepare the sampler from a renderer.
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*/
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void prepare(SoftwareRenderer *renderer);
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/**
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* Reset the sampler cache.
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*
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* This needs to be called after all setXXX method have been called.
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*/
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void reset();
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/**
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* Enable or disable the god rays effect.
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*/
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void setEnabled(bool enabled);
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/**
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* Set the lighting manager to use for raw sampling.
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*/
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void setLighting(LightingManager *manager);
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/**
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* Set the overall quality factor (0.0-1.0).
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*/
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void setQuality(double factor);
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/**
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* Set the quality indicators.
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*/
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void setQuality(double sampling_step, double max_length, double walk_step);
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/**
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* Set the camera location.
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*
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* This will fix the limits of sampling data, around the camera location.
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*/
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void setCameraLocation(const Vector3 &location);
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/**
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* Set the altitude boundaries.
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*/
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void setAltitudes(double low, double high);
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/**
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* Get the number of samples in each dimension.
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*/
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void getSamples(int *x, int *y, int *z) const;
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/**
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* Get the raw light at a location (without using the cached sampling).
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*/
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Color getRawLight(const Vector3 &location, bool filtered) const;
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/**
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* Get the lighting factor at a given point, using (and filling) the cached sampling.
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*/
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double getCachedLight(const Vector3 &location);
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/**
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* Get the god rays effect on a space segment.
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*/
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GodRaysResult getResult(const SpaceSegment &segment);
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/**
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* Apply the god rays effect to a location.
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*
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* 'raw' is the shaded color, without atmospheric effects.
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* 'atmosphered' is the shaded color, with atmospheric effects applied.
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*/
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Color apply(const Color &raw, const Color &atmosphered, const Vector3 &location);
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private:
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double getCache(int x, int y, int z);
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private:
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bool enabled;
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SpaceSegment *bounds;
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GodRaysDefinition *definition;
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double sampling_step;
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double max_length;
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double walk_step;
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int samples_x;
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int samples_y;
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int samples_z;
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double low_altitude;
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double high_altitude;
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Vector3 *camera_location;
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LightingManager *lighting;
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double *data;
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};
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}
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}
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#endif // GODRAYSSAMPLER_H
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