60 lines
2.4 KiB
C++
60 lines
2.4 KiB
C++
#pragma once
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#include <cgv/render/view.h>
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#include <cgv/media/axis_aligned_box.h>
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#include "lib_begin.h"
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namespace cgv {
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namespace render {
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class context;
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namespace gl {
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/** extends the view class with the following quantities:
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- z_near ... position of the near clipping plane
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- z_far ... position of the far clipping plane
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*/
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class CGV_API gl_view : public view
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{
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public:
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typedef media::axis_aligned_box<double,3> box_type;
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protected:
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double z_near;
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double z_far;
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box_type scene_extent;
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public:
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/// construct a parallel view with focus in the world origin looking in negative z-direction and the y-direction as up-direction with an extent of +-1
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gl_view();
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/// compute clipping planes adapted to the current scene extent, z_near_derived is at least z_near and as large as possible to include the scene, similarly z_far_derived is as small as possible
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void compute_clipping_planes(double& z_near_derived, double& z_far_derived, bool clip_relative_to_extent = false) const;
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/// compute clipping planes according to given view adapted to the current scene extent, z_near_derived is at least z_near and as large as possible to include the scene, similarly z_far_derived is as small as possible
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void compute_clipping_planes(const cgv::render::view& view, double& z_near_derived, double& z_far_derived, bool clip_relative_to_extent = false) const;
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/**@name getter and setter methods*/
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//@{
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/// return the currently set z-value for the z-near clipping plane
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double get_z_near() const;
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///set the z-value for the z-near clipping plane
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virtual void set_z_near(double z);
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/// return the currently set z-value for the z-far clipping plane
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double get_z_far() const;
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/// set the z-value for the z-far clipping plane
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virtual void set_z_far(double z);
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/// transform a z value in eye-coordinates (should be negative!) to device coordinate
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static double get_z_D(double z_eye, double z_near, double z_far);
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/// set the extent of the scene in world coordinates used by the compute_clipping_planes functions to adapt the clipping planes to the scene
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virtual void set_scene_extent(const box_type& _box);
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/// return the currently set scene extent
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box_type get_scene_extent() const;
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/// reset view with focus and y-extent based on current scene extent
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virtual void set_default_view();
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//@}
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};
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}
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}
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}
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#include <cgv/config/lib_end.h> |