ss/include/nw4r/g3d/g3d_camera.h

#ifndef NW4R_G3D_CAMERA_H
#define NW4R_G3D_CAMERA_H
#include <nw4r/types_nw4r.h>

#include "nw4r/g3d/res/g3d_rescommon.h"

#include "nw4r/math.h" // IWYU pragma: export

#include "rvl/MTX.h" // IWYU pragma: export

namespace nw4r {
namespace g3d {

struct CameraData {
    enum Flag {
        FLAG_CAM_LOOKAT = (1 << 0),
        FLAG_CAM_ROTATE = (1 << 1),
        FLAG_CAM_AIM = (1 << 2),
        FLAG_CAM_MTX_READY = (1 << 3),

        FLAG_PROJ_FRUSTUM = (1 << 4),
        FLAG_PROJ_PERSP = (1 << 5),
        FLAG_PROJ_ORTHO = (1 << 6),
        FLAG_PROJ_MTX_READY = (1 << 7),

        FLAG_VI_ODD_FIELD = (1 << 8),
    };

    math::MTX34 cameraMtx;     // at 0x0
    math::MTX44 projMtx;       // at 0x30
    u32 flags;                 // at 0x70
    math::VEC3 cameraPos;      // at 0x74
    math::VEC3 cameraUp;       // at 0x80
    math::VEC3 cameraTarget;   // at 0x8C
    math::VEC3 cameraRotate;   // at 0x98
    f32 cameraTwist;           // at 0xA4
    GXProjectionType projType; // at 0xA8
    f32 projFovy;              // at 0xAC
    f32 projAspect;            // at 0xB0
    f32 projNear;              // at 0xB4
    f32 projFar;               // at 0xB8
    f32 projTop;               // at 0xBC
    f32 projBottom;            // at 0xC0
    f32 projLeft;              // at 0xC4
    f32 projRight;             // at 0xC8
    f32 lightScaleS;           // at 0xCC
    f32 lightScaleT;           // at 0xD0
    f32 lightTransS;           // at 0xD4
    f32 lightTransT;           // at 0xD8
    math::VEC2 viewportOrigin; // at 0xDC
    math::VEC2 viewportSize;   // at 0xE4
    f32 viewportNear;          // at 0xEC
    f32 viewportFar;           // at 0xF0
    u32 scissorX;              // at 0xF4
    u32 scissorY;              // at 0xF8
    u32 scissorWidth;          // at 0xFC
    u32 scissorHeight;         // at 0x100
    s32 scissorOffsetX;        // at 0x104
    s32 scissorOffsetY;        // at 0x108
};

class Camera : public ResCommon<CameraData> {
public:
    enum PostureType {
        POSTURE_LOOKAT,
        POSTURE_ROTATE,
        POSTURE_AIM
    };

    struct PostureInfo {
        PostureType tp;          // at 0x0
        math::VEC3 cameraUp;     // at 0x4
        math::VEC3 cameraTarget; // at 0x10
        math::VEC3 cameraRotate; // at 0x1C
        f32 cameraTwist;         // at 0x28
    };

public:
    explicit Camera(CameraData *pData);

    void Init();
    void Init(u16 efbWidth, u16 efbHeight, u16 xfbWidth, u16 xfbHeight, u16 viWidth, u16 viHeight);

    void SetPosition(f32 x, f32 y, f32 z);
    void SetPosition(const math::VEC3 &rPos);

    void SetPosture(const PostureInfo &rInfo);
    void SetCameraMtxDirectly(const math::MTX34 &rMtx);
    void SetPerspective(f32 fovy, f32 aspect, f32 near, f32 far);
    void SetOrtho(f32 top, f32 bottom, f32 left, f32 right, f32 near, f32 far);
    void SetProjectionMtxDirectly(const math::MTX44 *pMtx);
    void SetTexMtxParam(f32 lightScaleS, f32 lightScaleT, f32 lightTransS, f32 lightTransT);

    void SetScissor(u32 x, u32 y, u32 width, u32 height);
    void SetScissorBoxOffset(s32 ox, s32 oy);

    void SetViewport(f32 x, f32 y, f32 width, f32 height);
    void SetViewportZRange(f32 near, f32 far);
    void GetViewport(f32 *pX, f32 *pY, f32 *pWidth, f32 *pHeight, f32 *pNear, f32 *pFar) const;

    void Project(math::VEC3 *pSrcPos, const math::VEC3 &worldPos) const;

    void GetCameraMtx(math::MTX34 *pMtx) const;
    void GetProjectionMtx(math::MTX44 *pMtx) const;
    void GetProjectionTexMtx(math::MTX34 *pMtx) const;
    void GetEnvironmentTexMtx(math::MTX34 *pMtx) const;

    void GXSetViewport() const;
    void GXSetProjection() const;
    void GXSetScissor() const;
    void GXSetScissorBoxOffset() const;

    GXProjectionType GetProjectionType() const {
        return ref().projType;
    }

private:
    void UpdateCameraMtx() const;
    void UpdateProjectionMtx() const;
};

} // namespace g3d
} // namespace nw4r

#endif