94 lines
2.3 KiB
C++
94 lines
2.3 KiB
C++
#pragma once
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#include "opengl_global.h"
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#include <vector>
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namespace paysages {
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namespace opengl {
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class OPENGLSHARED_EXPORT OpenGLVegetationLayer {
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public:
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OpenGLVegetationLayer(OpenGLVegetation *parent, VegetationLayerDefinition *definition, bool own_instances = true);
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virtual ~OpenGLVegetationLayer();
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inline auto getDefinition() const {
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return definition;
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}
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inline int getInstanceCount() const {
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return (int)instances.size();
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}
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/**
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* Collect instances in a given area, and add them to the array 'instances'.
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*
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* The array is not checked for already present instances.
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*/
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virtual void produceInstancesInArea(double xmin, double xmax, double zmin, double zmax,
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vector<OpenGLVegetationInstance *> *instances) const;
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/**
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* Remove instances outside of a given area.
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*/
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virtual void removeInstancesOutsideArea(double xmin, double xmax, double zmin, double zmax,
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vector<OpenGLVegetationInstance *> *instances) const;
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/**
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* Update the instances list.
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*
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* This should be called when the camera has moved enough to make a change.
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*/
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void updateInstances();
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/**
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* Update the impostor textures.
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*
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* This should be called when the camera has moved enough to make a change.
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*/
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void updateImpostor();
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/**
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* Perform maintenance tasks that can be perform in a thread.
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*
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* This will be called from a thread separate from the main GUI thread,
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* so it should not call OpenGL functions.
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*/
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void threadedUpdate();
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/**
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* Render the vegetation layer.
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*
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* This is called from the GUI thread.
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*/
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void render();
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/**
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* Reset to an initial state.
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*
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* It is only useful (and safe) from unit testing.
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*/
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void reset();
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/**
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* Set the current camera in use.
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*/
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void setCamera(const CameraDefinition *camera);
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private:
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OpenGLVegetation *parent;
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VegetationLayerDefinition *definition;
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double xmin;
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double xmax;
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double zmin;
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double zmax;
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double range;
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bool own_instances;
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vector<OpenGLVegetationInstance *> instances;
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Mutex *lock_instances;
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OpenGLVegetationImpostor *impostor;
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Vector3 *camera_location;
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bool camera_changed;
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};
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}
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}
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