minetest/irr/include/S3DVertex.h
2024-03-26 21:39:02 +01:00

289 lines
8.8 KiB
C++

// Copyright (C) 2002-2012 Nikolaus Gebhardt
// This file is part of the "Irrlicht Engine".
// For conditions of distribution and use, see copyright notice in irrlicht.h
#pragma once
#include "vector3d.h"
#include "vector2d.h"
#include "SColor.h"
namespace irr
{
namespace video
{
//! Enumeration for all vertex types there are.
enum E_VERTEX_TYPE
{
//! Standard vertex type used by the Irrlicht engine, video::S3DVertex.
EVT_STANDARD = 0,
//! Vertex with two texture coordinates, video::S3DVertex2TCoords.
/** Usually used for geometry with lightmaps or other special materials. */
EVT_2TCOORDS,
//! Vertex with a tangent and binormal vector, video::S3DVertexTangents.
/** Usually used for tangent space normal mapping.
Usually tangent and binormal get send to shaders as texture coordinate sets 1 and 2.
*/
EVT_TANGENTS
};
//! Array holding the built in vertex type names
const char *const sBuiltInVertexTypeNames[] = {
"standard",
"2tcoords",
"tangents",
0,
};
//! standard vertex used by the Irrlicht engine.
struct S3DVertex
{
//! default constructor
constexpr S3DVertex() :
Color(0xffffffff) {}
//! constructor
constexpr S3DVertex(f32 x, f32 y, f32 z, f32 nx, f32 ny, f32 nz, SColor c, f32 tu, f32 tv) :
Pos(x, y, z), Normal(nx, ny, nz), Color(c), TCoords(tu, tv) {}
//! constructor
constexpr S3DVertex(const core::vector3df &pos, const core::vector3df &normal,
SColor color, const core::vector2df &tcoords) :
Pos(pos),
Normal(normal), Color(color), TCoords(tcoords) {}
//! Position
core::vector3df Pos;
//! Normal vector
core::vector3df Normal;
//! Color
SColor Color;
//! Texture coordinates
core::vector2df TCoords;
constexpr bool operator==(const S3DVertex &other) const
{
return ((Pos == other.Pos) && (Normal == other.Normal) &&
(Color == other.Color) && (TCoords == other.TCoords));
}
constexpr bool operator!=(const S3DVertex &other) const
{
return ((Pos != other.Pos) || (Normal != other.Normal) ||
(Color != other.Color) || (TCoords != other.TCoords));
}
constexpr bool operator<(const S3DVertex &other) const
{
return ((Pos < other.Pos) ||
((Pos == other.Pos) && (Normal < other.Normal)) ||
((Pos == other.Pos) && (Normal == other.Normal) && (Color < other.Color)) ||
((Pos == other.Pos) && (Normal == other.Normal) && (Color == other.Color) && (TCoords < other.TCoords)));
}
//! Get type of the class
static E_VERTEX_TYPE getType()
{
return EVT_STANDARD;
}
//\param d d=0 returns other, d=1 returns this, values between interpolate.
S3DVertex getInterpolated(const S3DVertex &other, f32 d)
{
d = core::clamp(d, 0.0f, 1.0f);
return S3DVertex(Pos.getInterpolated(other.Pos, d),
Normal.getInterpolated(other.Normal, d),
Color.getInterpolated(other.Color, d),
TCoords.getInterpolated(other.TCoords, d));
}
};
//! Vertex with two texture coordinates.
/** Usually used for geometry with lightmaps
or other special materials.
*/
struct S3DVertex2TCoords : public S3DVertex
{
//! default constructor
constexpr S3DVertex2TCoords() :
S3DVertex() {}
//! constructor with two different texture coords, but no normal
constexpr S3DVertex2TCoords(f32 x, f32 y, f32 z, SColor c, f32 tu, f32 tv, f32 tu2, f32 tv2) :
S3DVertex(x, y, z, 0.0f, 0.0f, 0.0f, c, tu, tv), TCoords2(tu2, tv2) {}
//! constructor with two different texture coords, but no normal
constexpr S3DVertex2TCoords(const core::vector3df &pos, SColor color,
const core::vector2df &tcoords, const core::vector2df &tcoords2) :
S3DVertex(pos, core::vector3df(), color, tcoords),
TCoords2(tcoords2) {}
//! constructor with all values
constexpr S3DVertex2TCoords(const core::vector3df &pos, const core::vector3df &normal, const SColor &color,
const core::vector2df &tcoords, const core::vector2df &tcoords2) :
S3DVertex(pos, normal, color, tcoords),
TCoords2(tcoords2) {}
//! constructor with all values
constexpr S3DVertex2TCoords(f32 x, f32 y, f32 z, f32 nx, f32 ny, f32 nz,
SColor c, f32 tu, f32 tv, f32 tu2, f32 tv2) :
S3DVertex(x, y, z, nx, ny, nz, c, tu, tv),
TCoords2(tu2, tv2) {}
//! constructor with the same texture coords and normal
constexpr S3DVertex2TCoords(f32 x, f32 y, f32 z, f32 nx, f32 ny, f32 nz,
SColor c, f32 tu, f32 tv) :
S3DVertex(x, y, z, nx, ny, nz, c, tu, tv),
TCoords2(tu, tv) {}
//! constructor with the same texture coords and normal
constexpr S3DVertex2TCoords(const core::vector3df &pos, const core::vector3df &normal,
SColor color, const core::vector2df &tcoords) :
S3DVertex(pos, normal, color, tcoords),
TCoords2(tcoords) {}
//! constructor from S3DVertex
constexpr S3DVertex2TCoords(const S3DVertex &o) :
S3DVertex(o) {}
//! Second set of texture coordinates
core::vector2df TCoords2;
//! Equality operator
constexpr bool operator==(const S3DVertex2TCoords &other) const
{
return ((static_cast<S3DVertex>(*this) == static_cast<const S3DVertex &>(other)) &&
(TCoords2 == other.TCoords2));
}
//! Inequality operator
constexpr bool operator!=(const S3DVertex2TCoords &other) const
{
return ((static_cast<S3DVertex>(*this) != static_cast<const S3DVertex &>(other)) ||
(TCoords2 != other.TCoords2));
}
constexpr bool operator<(const S3DVertex2TCoords &other) const
{
return ((static_cast<S3DVertex>(*this) < other) ||
((static_cast<S3DVertex>(*this) == static_cast<const S3DVertex &>(other)) && (TCoords2 < other.TCoords2)));
}
static E_VERTEX_TYPE getType()
{
return EVT_2TCOORDS;
}
//\param d d=0 returns other, d=1 returns this, values between interpolate.
S3DVertex2TCoords getInterpolated(const S3DVertex2TCoords &other, f32 d)
{
d = core::clamp(d, 0.0f, 1.0f);
return S3DVertex2TCoords(Pos.getInterpolated(other.Pos, d),
Normal.getInterpolated(other.Normal, d),
Color.getInterpolated(other.Color, d),
TCoords.getInterpolated(other.TCoords, d),
TCoords2.getInterpolated(other.TCoords2, d));
}
};
//! Vertex with a tangent and binormal vector.
/** Usually used for tangent space normal mapping.
Usually tangent and binormal get send to shaders as texture coordinate sets 1 and 2.
*/
struct S3DVertexTangents : public S3DVertex
{
//! default constructor
S3DVertexTangents() :
S3DVertex() {}
//! constructor
constexpr S3DVertexTangents(f32 x, f32 y, f32 z, f32 nx = 0.0f, f32 ny = 0.0f, f32 nz = 0.0f,
SColor c = 0xFFFFFFFF, f32 tu = 0.0f, f32 tv = 0.0f,
f32 tanx = 0.0f, f32 tany = 0.0f, f32 tanz = 0.0f,
f32 bx = 0.0f, f32 by = 0.0f, f32 bz = 0.0f) :
S3DVertex(x, y, z, nx, ny, nz, c, tu, tv),
Tangent(tanx, tany, tanz), Binormal(bx, by, bz) {}
//! constructor
constexpr S3DVertexTangents(const core::vector3df &pos, SColor c,
const core::vector2df &tcoords) :
S3DVertex(pos, core::vector3df(), c, tcoords) {}
//! constructor
constexpr S3DVertexTangents(const core::vector3df &pos,
const core::vector3df &normal, SColor c,
const core::vector2df &tcoords,
const core::vector3df &tangent = core::vector3df(),
const core::vector3df &binormal = core::vector3df()) :
S3DVertex(pos, normal, c, tcoords),
Tangent(tangent), Binormal(binormal) {}
//! constructor from S3DVertex
constexpr S3DVertexTangents(const S3DVertex &o) :
S3DVertex(o) {}
//! Tangent vector along the x-axis of the texture
core::vector3df Tangent;
//! Binormal vector (tangent x normal)
core::vector3df Binormal;
constexpr bool operator==(const S3DVertexTangents &other) const
{
return ((static_cast<S3DVertex>(*this) == static_cast<const S3DVertex &>(other)) &&
(Tangent == other.Tangent) &&
(Binormal == other.Binormal));
}
constexpr bool operator!=(const S3DVertexTangents &other) const
{
return ((static_cast<S3DVertex>(*this) != static_cast<const S3DVertex &>(other)) ||
(Tangent != other.Tangent) ||
(Binormal != other.Binormal));
}
constexpr bool operator<(const S3DVertexTangents &other) const
{
return ((static_cast<S3DVertex>(*this) < other) ||
((static_cast<S3DVertex>(*this) == static_cast<const S3DVertex &>(other)) && (Tangent < other.Tangent)) ||
((static_cast<S3DVertex>(*this) == static_cast<const S3DVertex &>(other)) && (Tangent == other.Tangent) && (Binormal < other.Binormal)));
}
static E_VERTEX_TYPE getType()
{
return EVT_TANGENTS;
}
S3DVertexTangents getInterpolated(const S3DVertexTangents &other, f32 d)
{
d = core::clamp(d, 0.0f, 1.0f);
return S3DVertexTangents(Pos.getInterpolated(other.Pos, d),
Normal.getInterpolated(other.Normal, d),
Color.getInterpolated(other.Color, d),
TCoords.getInterpolated(other.TCoords, d),
Tangent.getInterpolated(other.Tangent, d),
Binormal.getInterpolated(other.Binormal, d));
}
};
inline u32 getVertexPitchFromType(E_VERTEX_TYPE vertexType)
{
switch (vertexType) {
case video::EVT_2TCOORDS:
return sizeof(video::S3DVertex2TCoords);
case video::EVT_TANGENTS:
return sizeof(video::S3DVertexTangents);
default:
return sizeof(video::S3DVertex);
}
}
} // end namespace video
} // end namespace irr