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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2021 Blender Foundation. */
#pragma once
/** \file
* \ingroup eevee
*/
#include "eevee_shader_shared.hh"
namespace blender::eevee {
class Instance;
static const float cubeface_mat[6][4][4] = {
/* Pos X */
{{0.0f, 0.0f, -1.0f, 0.0f},
{0.0f, -1.0f, 0.0f, 0.0f},
{-1.0f, 0.0f, 0.0f, 0.0f},
{0.0f, 0.0f, 0.0f, 1.0f}},
/* Neg X */
{{0.0f, 0.0f, 1.0f, 0.0f},
{0.0f, -1.0f, 0.0f, 0.0f},
{1.0f, 0.0f, 0.0f, 0.0f},
{0.0f, 0.0f, 0.0f, 1.0f}},
/* Pos Y */
{{1.0f, 0.0f, 0.0f, 0.0f},
{0.0f, 0.0f, -1.0f, 0.0f},
{0.0f, 1.0f, 0.0f, 0.0f},
{0.0f, 0.0f, 0.0f, 1.0f}},
/* Neg Y */
{{1.0f, 0.0f, 0.0f, 0.0f},
{0.0f, 0.0f, 1.0f, 0.0f},
{0.0f, -1.0f, 0.0f, 0.0f},
{0.0f, 0.0f, 0.0f, 1.0f}},
/* Pos Z */
{{1.0f, 0.0f, 0.0f, 0.0f},
{0.0f, -1.0f, 0.0f, 0.0f},
{0.0f, 0.0f, -1.0f, 0.0f},
{0.0f, 0.0f, 0.0f, 1.0f}},
/* Neg Z */
{{-1.0f, 0.0f, 0.0f, 0.0f},
{0.0f, -1.0f, 0.0f, 0.0f},
{0.0f, 0.0f, 1.0f, 0.0f},
{0.0f, 0.0f, 0.0f, 1.0f}},
};
inline void cubeface_winmat_get(float4x4 &winmat, float near, float far)
{
/* Simple 90° FOV projection. */
perspective_m4(winmat.ptr(), -near, near, -near, near, near, far);
}
/* -------------------------------------------------------------------- */
/** \name CameraData operators
* \{ */
inline bool operator==(const CameraData &a, const CameraData &b)
{
return compare_m4m4(a.persmat.ptr(), b.persmat.ptr(), FLT_MIN) && (a.uv_scale == b.uv_scale) &&
(a.uv_bias == b.uv_bias) && (a.equirect_scale == b.equirect_scale) &&
(a.equirect_bias == b.equirect_bias) && (a.fisheye_fov == b.fisheye_fov) &&
(a.fisheye_lens == b.fisheye_lens) && (a.filter_size == b.filter_size) &&
(a.type == b.type);
}
inline bool operator!=(const CameraData &a, const CameraData &b)
{
return !(a == b);
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name Camera
* \{ */
/**
* Point of view in the scene. Can be init from viewport or camera object.
*/
class Camera {
private:
Instance &inst_;
/** Double buffered to detect changes and have history for re-projection. */
SwapChain<CameraDataBuf, 2> data_;
/** Detects wrong usage. */
bool synced_ = false;
public:
Camera(Instance &inst) : inst_(inst){};
~Camera(){};
void init();
void sync();
/**
* Getters
**/
const CameraData &data_get() const
{
BLI_assert(synced_);
return data_.current();
}
const GPUUniformBuf *ubo_get() const
{
return data_.current();
}
bool is_panoramic() const
{
return eevee::is_panoramic(data_.current().type);
}
bool is_orthographic() const
{
return data_.current().type == CAMERA_ORTHO;
}
const float3 &position() const
{
return *reinterpret_cast<const float3 *>(data_.current().viewinv[3]);
}
const float3 &forward() const
{
return *reinterpret_cast<const float3 *>(data_.current().viewinv[2]);
}
};
/** \} */
} // namespace blender::eevee
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