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#pragma once
#include "../Primitives/Matrix4x4.h"
#include "../Primitives/Rect.h"
namespace nCine
{
/// Camera that handles matrices for shaders
class Camera
{
public:
/// Values for the projection matrix
struct ProjectionValues
{
float left;
float right;
float top;
float bottom;
float nearClip;
float farClip;
ProjectionValues()
: left(0.0f), right(0.0f), top(0.0f), bottom(0.0f), nearClip(-1.0f), farClip(1.0f) {}
ProjectionValues(float ll, float rr, float tt, float bb)
: left(ll), right(rr), top(tt), bottom(bb), nearClip(-1.0f), farClip(1.0f) {}
};
/// Values for the view matrix
struct ViewValues
{
Vector2f position;
float rotation;
float scale;
ViewValues()
: position(0.0f, 0.0f), rotation(0.0f), scale(1.0f) {}
ViewValues(float xx, float yy, float rr, float ss)
: position(xx, yy), rotation(rr), scale(ss) {}
};
/// Creates a camera with default matrices
Camera();
inline const ProjectionValues& GetProjectionValues() const {
return projectionValues_;
}
inline const ViewValues& GetViewValues() const {
return viewValues_;
}
inline const Matrix4x4f& GetProjection() const {
return projection_;
}
inline const Matrix4x4f& GetView() const {
return view_;
}
void SetOrthoProjection(float left, float right, float top, float bottom);
void SetOrthoProjection(const ProjectionValues& values);
void SetView(Vector2f pos, float rotation, float scale);
void SetView(float x, float y, float rotation, float scale);
void SetView(const ViewValues& values);
inline std::uint32_t UpdateFrameProjectionMatrix() const {
return updateFrameProjectionMatrix_;
}
inline std::uint32_t UpdateFrameViewMatrix() const {
return updateFrameViewMatrix_;
}
private:
ProjectionValues projectionValues_;
ViewValues viewValues_;
Matrix4x4f projection_;
Matrix4x4f view_;
/// Last frame when the projection matrix was changed
std::uint32_t updateFrameProjectionMatrix_;
/// Last frame when the model matrix was changed
std::uint32_t updateFrameViewMatrix_;
};
}
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