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ImGuizmo.cpp
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ImGuizmo.cpp
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// The MIT License(MIT)
//
// Copyright(c) 2016 Cedric Guillemet
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files(the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions :
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
#include "imgui.h"
#ifndef IMGUI_DEFINE_MATH_OPERATORS
#define IMGUI_DEFINE_MATH_OPERATORS
#endif
#include "imgui_internal.h"
#include "ImGuizmo.h"
#include <algorithm>
// includes patches for multiview from
// https://github.com/CedricGuillemet/ImGuizmo/issues/15
#define LINE_SIZE 8.0f
#define ARROW_SIZE 12.0f
#undef min
#undef max
namespace ImGuizmo
{
static const float ZPI = 3.14159265358979323846f;
static const float RAD2DEG = (180.f / ZPI);
static const float DEG2RAD = (ZPI / 180.f);
const float screenRotateSize = 0.1f;
struct GlowAnimTimer
{
float currentTime_ = 0.0f;
float GetAnimTime() { return currentTime_ * 6.28318530718f * 1.3f; }
float GetTimeCurve() { return 0.5f + sinf(GetAnimTime()) * 0.5f; }
void Activity(bool state) {
if (!state)
currentTime_ = 0.0f;
}
float Update(float value)
{
}
};
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// utility and math
void FPU_MatrixF_x_MatrixF(const float *a, const float *b, float *r)
{
r[0] = a[0] * b[0] + a[1] * b[4] + a[2] * b[8] + a[3] * b[12];
r[1] = a[0] * b[1] + a[1] * b[5] + a[2] * b[9] + a[3] * b[13];
r[2] = a[0] * b[2] + a[1] * b[6] + a[2] * b[10] + a[3] * b[14];
r[3] = a[0] * b[3] + a[1] * b[7] + a[2] * b[11] + a[3] * b[15];
r[4] = a[4] * b[0] + a[5] * b[4] + a[6] * b[8] + a[7] * b[12];
r[5] = a[4] * b[1] + a[5] * b[5] + a[6] * b[9] + a[7] * b[13];
r[6] = a[4] * b[2] + a[5] * b[6] + a[6] * b[10] + a[7] * b[14];
r[7] = a[4] * b[3] + a[5] * b[7] + a[6] * b[11] + a[7] * b[15];
r[8] = a[8] * b[0] + a[9] * b[4] + a[10] * b[8] + a[11] * b[12];
r[9] = a[8] * b[1] + a[9] * b[5] + a[10] * b[9] + a[11] * b[13];
r[10] = a[8] * b[2] + a[9] * b[6] + a[10] * b[10] + a[11] * b[14];
r[11] = a[8] * b[3] + a[9] * b[7] + a[10] * b[11] + a[11] * b[15];
r[12] = a[12] * b[0] + a[13] * b[4] + a[14] * b[8] + a[15] * b[12];
r[13] = a[12] * b[1] + a[13] * b[5] + a[14] * b[9] + a[15] * b[13];
r[14] = a[12] * b[2] + a[13] * b[6] + a[14] * b[10] + a[15] * b[14];
r[15] = a[12] * b[3] + a[13] * b[7] + a[14] * b[11] + a[15] * b[15];
}
//template <typename T> T LERP(T x, T y, float z) { return (x + (y - x)*z); }
template <typename T> T Clamp(T x, T y, T z) { return ((x<y) ? y : ((x>z) ? z : x)); }
//template <typename T> T max(T x, T y) { return (x > y) ? x : y; }
//template <typename T> T min(T x, T y) { return (x < y) ? x : y; }
template <typename T> bool IsWithin(T x, T y, T z) { return (x>=y) && (x<=z); }
struct matrix_t;
struct vec_t
{
public:
float x, y, z, w;
void Lerp(const vec_t& v, float t)
{
x += (v.x - x) * t;
y += (v.y - y) * t;
z += (v.z - z) * t;
w += (v.w - w) * t;
}
void Set(float v) { x = y = z = w = v; }
void Set(float _x, float _y, float _z = 0.f, float _w = 0.f) { x = _x; y = _y; z = _z; w = _w; }
vec_t& operator -= (const vec_t& v) { x -= v.x; y -= v.y; z -= v.z; w -= v.w; return *this; }
vec_t& operator += (const vec_t& v) { x += v.x; y += v.y; z += v.z; w += v.w; return *this; }
vec_t& operator *= (const vec_t& v) { x *= v.x; y *= v.y; z *= v.z; w *= v.w; return *this; }
vec_t& operator *= (float v) { x *= v; y *= v; z *= v; w *= v; return *this; }
vec_t operator * (float f) const;
vec_t operator - () const;
vec_t operator - (const vec_t& v) const;
vec_t operator + (const vec_t& v) const;
vec_t operator * (const vec_t& v) const;
const vec_t& operator + () const { return (*this); }
float Length() const { return sqrtf(x*x + y*y + z*z); };
float LengthSq() const { return (x*x + y*y + z*z); };
vec_t Normalize() { (*this) *= (1.f / Length()); return (*this); }
vec_t Normalize(const vec_t& v) { this->Set(v.x, v.y, v.z, v.w); this->Normalize(); return (*this); }
vec_t Abs() const;
void Cross(const vec_t& v)
{
vec_t res;
res.x = y * v.z - z * v.y;
res.y = z * v.x - x * v.z;
res.z = x * v.y - y * v.x;
x = res.x;
y = res.y;
z = res.z;
w = 0.f;
}
void Cross(const vec_t& v1, const vec_t& v2)
{
x = v1.y * v2.z - v1.z * v2.y;
y = v1.z * v2.x - v1.x * v2.z;
z = v1.x * v2.y - v1.y * v2.x;
w = 0.f;
}
float Dot(const vec_t &v) const
{
return (x * v.x) + (y * v.y) + (z * v.z) + (w * v.w);
}
float Dot3(const vec_t &v) const
{
return (x * v.x) + (y * v.y) + (z * v.z);
}
void Transform(const matrix_t& matrix);
void Transform(const vec_t & s, const matrix_t& matrix);
void TransformVector(const matrix_t& matrix);
void TransformPoint(const matrix_t& matrix);
void TransformVector(const vec_t& v, const matrix_t& matrix) { (*this) = v; this->TransformVector(matrix); }
void TransformPoint(const vec_t& v, const matrix_t& matrix) { (*this) = v; this->TransformPoint(matrix); }
float& operator [] (size_t index) { return ((float*)&x)[index]; }
const float& operator [] (size_t index) const { return ((float*)&x)[index]; }
};
vec_t makeVect(float _x, float _y, float _z = 0.f, float _w = 0.f) { vec_t res; res.x = _x; res.y = _y; res.z = _z; res.w = _w; return res; }
vec_t vec_t::operator * (float f) const { return makeVect(x * f, y * f, z * f, w *f); }
vec_t vec_t::operator - () const { return makeVect(-x, -y, -z, -w); }
vec_t vec_t::operator - (const vec_t& v) const { return makeVect(x - v.x, y - v.y, z - v.z, w - v.w); }
vec_t vec_t::operator + (const vec_t& v) const { return makeVect(x + v.x, y + v.y, z + v.z, w + v.w); }
vec_t vec_t::operator * (const vec_t& v) const { return makeVect(x * v.x, y * v.y, z * v.z, w * v.w); }
vec_t vec_t::Abs() const { return makeVect(fabsf(x), fabsf(y), fabsf(z)); }
vec_t Normalized(const vec_t& v) { vec_t res; res = v; res.Normalize(); return res; }
vec_t Cross(const vec_t& v1, const vec_t& v2)
{
vec_t res;
res.x = v1.y * v2.z - v1.z * v2.y;
res.y = v1.z * v2.x - v1.x * v2.z;
res.z = v1.x * v2.y - v1.y * v2.x;
res.w = 0.f;
return res;
}
float Dot(const vec_t &v1, const vec_t &v2)
{
return (v1.x * v2.x) + (v1.y * v2.y) + (v1.z * v2.z);
}
vec_t BuildPlan(const vec_t & p_point1, const vec_t & p_normal)
{
vec_t normal, res;
normal.Normalize(p_normal);
res.w = normal.Dot(p_point1);
res.x = normal.x;
res.y = normal.y;
res.z = normal.z;
return res;
}
struct matrix_t
{
public:
union
{
float m[4][4];
float m16[16];
struct
{
vec_t right, up, dir, position;
} v;
vec_t component[4];
};
matrix_t(const matrix_t& other) { memcpy(&m16[0], &other.m16[0], sizeof(float) * 16); }
matrix_t() {}
operator float * () { return m16; }
operator const float* () const { return m16; }
void Translation(float _x, float _y, float _z) { this->Translation(makeVect(_x, _y, _z)); }
void Translation(const vec_t& vt)
{
v.right.Set(1.f, 0.f, 0.f, 0.f);
v.up.Set(0.f, 1.f, 0.f, 0.f);
v.dir.Set(0.f, 0.f, 1.f, 0.f);
v.position.Set(vt.x, vt.y, vt.z, 1.f);
}
void Scale(float _x, float _y, float _z)
{
v.right.Set(_x, 0.f, 0.f, 0.f);
v.up.Set(0.f, _y, 0.f, 0.f);
v.dir.Set(0.f, 0.f, _z, 0.f);
v.position.Set(0.f, 0.f, 0.f, 1.f);
}
void Scale(const vec_t& s) { Scale(s.x, s.y, s.z); }
matrix_t& operator *= (const matrix_t& mat)
{
matrix_t tmpMat;
tmpMat = *this;
tmpMat.Multiply(mat);
*this = tmpMat;
return *this;
}
matrix_t operator * (const matrix_t& mat) const
{
matrix_t matT;
matT.Multiply(*this, mat);
return matT;
}
void Multiply(const matrix_t &matrix)
{
matrix_t tmp;
tmp = *this;
FPU_MatrixF_x_MatrixF((float*)&tmp, (float*)&matrix, (float*)this);
}
void Multiply(const matrix_t &m1, const matrix_t &m2)
{
FPU_MatrixF_x_MatrixF((float*)&m1, (float*)&m2, (float*)this);
}
float GetDeterminant() const
{
return m[0][0] * m[1][1] * m[2][2] + m[0][1] * m[1][2] * m[2][0] + m[0][2] * m[1][0] * m[2][1] -
m[0][2] * m[1][1] * m[2][0] - m[0][1] * m[1][0] * m[2][2] - m[0][0] * m[1][2] * m[2][1];
}
float Inverse(const matrix_t &srcMatrix, bool affine = false);
void SetToIdentity()
{
v.right.Set(1.f, 0.f, 0.f, 0.f);
v.up.Set(0.f, 1.f, 0.f, 0.f);
v.dir.Set(0.f, 0.f, 1.f, 0.f);
v.position.Set(0.f, 0.f, 0.f, 1.f);
}
void Transpose()
{
matrix_t tmpm;
for (int l = 0; l < 4; l++)
{
for (int c = 0; c < 4; c++)
{
tmpm.m[l][c] = m[c][l];
}
}
(*this) = tmpm;
}
void RotationAxis(const vec_t & axis, float angle);
void OrthoNormalize()
{
v.right.Normalize();
v.up.Normalize();
v.dir.Normalize();
}
};
void vec_t::Transform(const matrix_t& matrix)
{
vec_t out;
out.x = x * matrix.m[0][0] + y * matrix.m[1][0] + z * matrix.m[2][0] + w * matrix.m[3][0];
out.y = x * matrix.m[0][1] + y * matrix.m[1][1] + z * matrix.m[2][1] + w * matrix.m[3][1];
out.z = x * matrix.m[0][2] + y * matrix.m[1][2] + z * matrix.m[2][2] + w * matrix.m[3][2];
out.w = x * matrix.m[0][3] + y * matrix.m[1][3] + z * matrix.m[2][3] + w * matrix.m[3][3];
x = out.x;
y = out.y;
z = out.z;
w = out.w;
}
void vec_t::Transform(const vec_t & s, const matrix_t& matrix)
{
*this = s;
Transform(matrix);
}
void vec_t::TransformPoint(const matrix_t& matrix)
{
vec_t out;
out.x = x * matrix.m[0][0] + y * matrix.m[1][0] + z * matrix.m[2][0] + matrix.m[3][0];
out.y = x * matrix.m[0][1] + y * matrix.m[1][1] + z * matrix.m[2][1] + matrix.m[3][1];
out.z = x * matrix.m[0][2] + y * matrix.m[1][2] + z * matrix.m[2][2] + matrix.m[3][2];
out.w = x * matrix.m[0][3] + y * matrix.m[1][3] + z * matrix.m[2][3] + matrix.m[3][3];
x = out.x;
y = out.y;
z = out.z;
w = out.w;
}
void vec_t::TransformVector(const matrix_t& matrix)
{
vec_t out;
out.x = x * matrix.m[0][0] + y * matrix.m[1][0] + z * matrix.m[2][0];
out.y = x * matrix.m[0][1] + y * matrix.m[1][1] + z * matrix.m[2][1];
out.z = x * matrix.m[0][2] + y * matrix.m[1][2] + z * matrix.m[2][2];
out.w = x * matrix.m[0][3] + y * matrix.m[1][3] + z * matrix.m[2][3];
x = out.x;
y = out.y;
z = out.z;
w = out.w;
}
float matrix_t::Inverse(const matrix_t &srcMatrix, bool affine)
{
float det = 0;
if (affine)
{
det = GetDeterminant();
float s = 1 / det;
m[0][0] = (srcMatrix.m[1][1] * srcMatrix.m[2][2] - srcMatrix.m[1][2] * srcMatrix.m[2][1]) * s;
m[0][1] = (srcMatrix.m[2][1] * srcMatrix.m[0][2] - srcMatrix.m[2][2] * srcMatrix.m[0][1]) * s;
m[0][2] = (srcMatrix.m[0][1] * srcMatrix.m[1][2] - srcMatrix.m[0][2] * srcMatrix.m[1][1]) * s;
m[1][0] = (srcMatrix.m[1][2] * srcMatrix.m[2][0] - srcMatrix.m[1][0] * srcMatrix.m[2][2]) * s;
m[1][1] = (srcMatrix.m[2][2] * srcMatrix.m[0][0] - srcMatrix.m[2][0] * srcMatrix.m[0][2]) * s;
m[1][2] = (srcMatrix.m[0][2] * srcMatrix.m[1][0] - srcMatrix.m[0][0] * srcMatrix.m[1][2]) * s;
m[2][0] = (srcMatrix.m[1][0] * srcMatrix.m[2][1] - srcMatrix.m[1][1] * srcMatrix.m[2][0]) * s;
m[2][1] = (srcMatrix.m[2][0] * srcMatrix.m[0][1] - srcMatrix.m[2][1] * srcMatrix.m[0][0]) * s;
m[2][2] = (srcMatrix.m[0][0] * srcMatrix.m[1][1] - srcMatrix.m[0][1] * srcMatrix.m[1][0]) * s;
m[3][0] = -(m[0][0] * srcMatrix.m[3][0] + m[1][0] * srcMatrix.m[3][1] + m[2][0] * srcMatrix.m[3][2]);
m[3][1] = -(m[0][1] * srcMatrix.m[3][0] + m[1][1] * srcMatrix.m[3][1] + m[2][1] * srcMatrix.m[3][2]);
m[3][2] = -(m[0][2] * srcMatrix.m[3][0] + m[1][2] * srcMatrix.m[3][1] + m[2][2] * srcMatrix.m[3][2]);
}
else
{
// transpose matrix
float src[16];
for (int i = 0; i < 4; ++i)
{
src[i] = srcMatrix.m16[i * 4];
src[i + 4] = srcMatrix.m16[i * 4 + 1];
src[i + 8] = srcMatrix.m16[i * 4 + 2];
src[i + 12] = srcMatrix.m16[i * 4 + 3];
}
// calculate pairs for first 8 elements (cofactors)
float tmp[12]; // temp array for pairs
tmp[0] = src[10] * src[15];
tmp[1] = src[11] * src[14];
tmp[2] = src[9] * src[15];
tmp[3] = src[11] * src[13];
tmp[4] = src[9] * src[14];
tmp[5] = src[10] * src[13];
tmp[6] = src[8] * src[15];
tmp[7] = src[11] * src[12];
tmp[8] = src[8] * src[14];
tmp[9] = src[10] * src[12];
tmp[10] = src[8] * src[13];
tmp[11] = src[9] * src[12];
// calculate first 8 elements (cofactors)
m16[0] = (tmp[0] * src[5] + tmp[3] * src[6] + tmp[4] * src[7]) - (tmp[1] * src[5] + tmp[2] * src[6] + tmp[5] * src[7]);
m16[1] = (tmp[1] * src[4] + tmp[6] * src[6] + tmp[9] * src[7]) - (tmp[0] * src[4] + tmp[7] * src[6] + tmp[8] * src[7]);
m16[2] = (tmp[2] * src[4] + tmp[7] * src[5] + tmp[10] * src[7]) - (tmp[3] * src[4] + tmp[6] * src[5] + tmp[11] * src[7]);
m16[3] = (tmp[5] * src[4] + tmp[8] * src[5] + tmp[11] * src[6]) - (tmp[4] * src[4] + tmp[9] * src[5] + tmp[10] * src[6]);
m16[4] = (tmp[1] * src[1] + tmp[2] * src[2] + tmp[5] * src[3]) - (tmp[0] * src[1] + tmp[3] * src[2] + tmp[4] * src[3]);
m16[5] = (tmp[0] * src[0] + tmp[7] * src[2] + tmp[8] * src[3]) - (tmp[1] * src[0] + tmp[6] * src[2] + tmp[9] * src[3]);
m16[6] = (tmp[3] * src[0] + tmp[6] * src[1] + tmp[11] * src[3]) - (tmp[2] * src[0] + tmp[7] * src[1] + tmp[10] * src[3]);
m16[7] = (tmp[4] * src[0] + tmp[9] * src[1] + tmp[10] * src[2]) - (tmp[5] * src[0] + tmp[8] * src[1] + tmp[11] * src[2]);
// calculate pairs for second 8 elements (cofactors)
tmp[0] = src[2] * src[7];
tmp[1] = src[3] * src[6];
tmp[2] = src[1] * src[7];
tmp[3] = src[3] * src[5];
tmp[4] = src[1] * src[6];
tmp[5] = src[2] * src[5];
tmp[6] = src[0] * src[7];
tmp[7] = src[3] * src[4];
tmp[8] = src[0] * src[6];
tmp[9] = src[2] * src[4];
tmp[10] = src[0] * src[5];
tmp[11] = src[1] * src[4];
// calculate second 8 elements (cofactors)
m16[8] = (tmp[0] * src[13] + tmp[3] * src[14] + tmp[4] * src[15]) - (tmp[1] * src[13] + tmp[2] * src[14] + tmp[5] * src[15]);
m16[9] = (tmp[1] * src[12] + tmp[6] * src[14] + tmp[9] * src[15]) - (tmp[0] * src[12] + tmp[7] * src[14] + tmp[8] * src[15]);
m16[10] = (tmp[2] * src[12] + tmp[7] * src[13] + tmp[10] * src[15]) - (tmp[3] * src[12] + tmp[6] * src[13] + tmp[11] * src[15]);
m16[11] = (tmp[5] * src[12] + tmp[8] * src[13] + tmp[11] * src[14]) - (tmp[4] * src[12] + tmp[9] * src[13] + tmp[10] * src[14]);
m16[12] = (tmp[2] * src[10] + tmp[5] * src[11] + tmp[1] * src[9]) - (tmp[4] * src[11] + tmp[0] * src[9] + tmp[3] * src[10]);
m16[13] = (tmp[8] * src[11] + tmp[0] * src[8] + tmp[7] * src[10]) - (tmp[6] * src[10] + tmp[9] * src[11] + tmp[1] * src[8]);
m16[14] = (tmp[6] * src[9] + tmp[11] * src[11] + tmp[3] * src[8]) - (tmp[10] * src[11] + tmp[2] * src[8] + tmp[7] * src[9]);
m16[15] = (tmp[10] * src[10] + tmp[4] * src[8] + tmp[9] * src[9]) - (tmp[8] * src[9] + tmp[11] * src[10] + tmp[5] * src[8]);
// calculate determinant
det = src[0] * m16[0] + src[1] * m16[1] + src[2] * m16[2] + src[3] * m16[3];
// calculate matrix inverse
float invdet = 1 / det;
for (int j = 0; j < 16; ++j)
{
m16[j] *= invdet;
}
}
return det;
}
void matrix_t::RotationAxis(const vec_t & axis, float angle)
{
float length2 = axis.LengthSq();
if (length2 < FLT_EPSILON)
{
SetToIdentity();
return;
}
vec_t n = axis * (1.f / sqrtf(length2));
float s = sinf(angle);
float c = cosf(angle);
float k = 1.f - c;
float xx = n.x * n.x * k + c;
float yy = n.y * n.y * k + c;
float zz = n.z * n.z * k + c;
float xy = n.x * n.y * k;
float yz = n.y * n.z * k;
float zx = n.z * n.x * k;
float xs = n.x * s;
float ys = n.y * s;
float zs = n.z * s;
m[0][0] = xx;
m[0][1] = xy + zs;
m[0][2] = zx - ys;
m[0][3] = 0.f;
m[1][0] = xy - zs;
m[1][1] = yy;
m[1][2] = yz + xs;
m[1][3] = 0.f;
m[2][0] = zx + ys;
m[2][1] = yz - xs;
m[2][2] = zz;
m[2][3] = 0.f;
m[3][0] = 0.f;
m[3][1] = 0.f;
m[3][2] = 0.f;
m[3][3] = 1.f;
}
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//
enum MOVETYPE
{
NONE,
MOVE_X,
MOVE_Y,
MOVE_Z,
MOVE_XY,
MOVE_XZ,
MOVE_YZ,
MOVE_SCREEN,
ROTATE_X,
ROTATE_Y,
ROTATE_Z,
ROTATE_SCREEN,
SCALE_X,
SCALE_Y,
SCALE_Z,
SCALE_XY,
SCALE_XZ,
SCALE_YZ,
SCALE_XYZ,
BOUNDS
};
struct Context
{
Context() : mbUsing(false), mbEnable(true), mbUsingBounds(false)
{
}
ImDrawList* mDrawList;
unsigned markerBit = 0;
MODE mMode;
MOVETYPE mMoveType = NONE;
matrix_t mViewMat;
matrix_t mProjectionMat;
matrix_t mModel;
matrix_t mModelInverse;
matrix_t mModelSource;
matrix_t mModelSourceInverse;
matrix_t mMVP;
matrix_t mViewProjection;
vec_t mModelScaleOrigin;
vec_t mCameraEye;
vec_t mCameraRight;
vec_t mCameraDir;
vec_t mCameraUp;
vec_t mRayOrigin;
vec_t mRayVector;
float mRadiusSquareCenter;
ImVec2 mScreenSquareCenter;
ImVec2 mScreenSquareMin;
ImVec2 mScreenSquareMax;
float mScreenFactor;
vec_t mRelativeOrigin;
bool mbUsing;
bool mbEnable;
// Axes will not be displayed, any planar axes using it will not be displayed
bool disableX = false;
bool disableY = false;
bool disableZ = false;
// Disable screen oriented actions
bool disableScreen = false;
// Disable all planar handles
bool disablePlanar = false;
bool drawText = true;
// translation
vec_t mTranslationPlan;
vec_t mTranslationPlanOrigin;
vec_t mMatrixOrigin;
// rotation
vec_t mRotationVectorSource;
float mRotationAngle;
float mRotationAngleOrigin;
//vec_t mWorldToLocalAxis;
// scale
vec_t mScale;
vec_t mScaleValueOrigin;
float mSaveMousePosx;
// save axis factor when using gizmo
bool mBelowAxisLimit[3];
bool mBelowPlaneLimit[3];
float mAxisFactor[3];
// bounds stretching
vec_t mBoundsPivot;
vec_t mBoundsAnchor;
vec_t mBoundsPlan;
vec_t mBoundsLocalPivot;
int mBoundsBestAxis;
int mBoundsAxis[2];
bool mbUsingBounds;
matrix_t mBoundsMatrix;
//
int mCurrentOperation;
float mX = 0.f;
float mY = 0.f;
float mWidth = 0.f;
float mHeight = 0.f;
float mXMax = 0.f;
float mYMax = 0.f;
};
//static Context* DefaultContext = new Context();
static Context* gContext = 0x0;// DefaultContext;
Context* CreateContext()
{
return new Context();
}
void DestroyContext(Context* ctx)
{
delete ctx;
}
void SetContext(Context* ctx)
{
if (ctx == nullptr)
gContext = 0x0;
else
gContext = ctx;
}
void SetDrawText(Context* ctx, bool state)
{
ctx->drawText = state;
}
void SetMarkerBit(int idx, bool state)
{
if (state)
gContext->markerBit |= (1 << idx);
else
gContext->markerBit &= ~(1 << idx);
}
bool GetMarkerBit(int idx)
{
return gContext->markerBit & (1 << idx);
}
static const float angleLimit = 0.96f;
static const float planeLimit = 0.2f;
static const vec_t directionUnary[3] = { makeVect(1.f, 0.f, 0.f), makeVect(0.f, 1.f, 0.f), makeVect(0.f, 0.f, 1.f) };
static const ImU32 directionColor[3] = { 0xFF0000AA, 0xFF00AA00, 0xFFAA0000 };
// Alpha: 100%: FF, 87%: DE, 70%: B3, 54%: 8A, 50%: 80, 38%: 61, 12%: 1F
static const ImU32 planeBorderColor[3] = { 0xFFAA0000, 0xFF0000AA, 0xFF00AA00 };
static const ImU32 planeColor[3] = { 0x610000AA, 0x6100AA00, 0x61AA0000 };
static const ImU32 scalePlaneColor[3] = { 0x6100AA00, 0x61AA0000, 0x610000AA };
static const ImU32 selectionColor = 0xAA00D7FF;//0x8A1080FF;
static const ImU32 inactiveColor = 0x99999999;
static const ImU32 translationLineColor = 0xAAAAAAAA;
static const char *translationInfoMask[] = { "X : %5.3f", "Y : %5.3f", "Z : %5.3f", "X : %5.3f Y : %5.3f", "Y : %5.3f Z : %5.3f", "X : %5.3f Z : %5.3f", "X : %5.3f Y : %5.3f Z : %5.3f" };
static const char *scaleInfoMask[] = {
"X : %5.2f",
"Y : %5.2f",
"Z : %5.2f",
"X : %5.2f Y : %5.2f",
"X : %5.2f Z : %5.2f",
"Y : %5.2f Z : %5.2f",
"XYZ : %5.2f"
};
static const char *rotationInfoMask[] = { "X : %5.2f deg %5.2f rad", "Y : %5.2f deg %5.2f rad", "Z : %5.2f deg %5.2f rad", "Screen : %5.2f deg %5.2f rad" };
static const int translationInfoIndex[] = { 0,0,0, 1,0,0, 2,0,0, 0,1,0, 1,2,0, 0,2,1, 0,1,2 };
static const float quadMin = 0.3f;
static const float quadMax = 0.8f;
static const float quadUV[8] = { quadMin, quadMin, quadMin, quadMax, quadMax, quadMax, quadMax, quadMin };
static const int halfCircleSegmentCount = 64;
static const float snapTension = 0.5f;
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//
static int GetMoveType(vec_t *gizmoHitProportion);
static int GetRotateType();
static int GetScaleType();
static ImVec2 worldToPos(const vec_t& worldPos, const matrix_t& mat)
{
vec_t trans;
trans.TransformPoint(worldPos, mat);
trans *= 0.5f / trans.w;
trans += makeVect(0.5f, 0.5f);
trans.y = 1.f - trans.y;
trans.x *= gContext->mWidth;
trans.y *= gContext->mHeight;
trans.x += gContext->mX;
trans.y += gContext->mY;
return ImVec2(trans.x, trans.y);
}
static void ComputeCameraRay(vec_t &rayOrigin, vec_t &rayDir)
{
ImGuiIO& io = ImGui::GetIO();
matrix_t mViewProjInverse;
mViewProjInverse.Inverse(gContext->mViewMat * gContext->mProjectionMat);
float mox = ((io.MousePos.x - gContext->mX) / gContext->mWidth) * 2.f - 1.f;
float moy = (1.f - ((io.MousePos.y - gContext->mY) / gContext->mHeight)) * 2.f - 1.f;
rayOrigin.Transform(makeVect(mox, moy, 0.f, 1.f), mViewProjInverse);
rayOrigin *= 1.f / rayOrigin.w;
vec_t rayEnd;
rayEnd.Transform(makeVect(mox, moy, 1.f, 1.f), mViewProjInverse);
rayEnd *= 1.f / rayEnd.w;
rayDir = Normalized(rayEnd - rayOrigin);
}
static float IntersectRayPlane(const vec_t & rOrigin, const vec_t& rVector, const vec_t& plan)
{
float numer = plan.Dot3(rOrigin) - plan.w;
float denom = plan.Dot3(rVector);
if (fabsf(denom) < FLT_EPSILON) // normal is orthogonal to vector, cant intersect
return -1.0f;
return -(numer / denom);
}
static bool IsInContextRect( ImVec2 p )
{
return IsWithin( p.x, gContext->mX, gContext->mXMax ) && IsWithin(p.y, gContext->mY, gContext->mYMax );
}
void SetRect(float x, float y, float width, float height)
{
gContext->mX = x;
gContext->mY = y;
gContext->mWidth = width;
gContext->mHeight = height;
gContext->mXMax = gContext->mX + gContext->mWidth;
gContext->mYMax = gContext->mY + gContext->mXMax;
}
void SetDrawlist()
{
gContext->mDrawList = ImGui::GetWindowDrawList();
}
void BeginFrame()
{
ImGuiIO& io = ImGui::GetIO();
if (gContext == nullptr)
return;
const ImU32 flags = ImGuiWindowFlags_NoTitleBar | ImGuiWindowFlags_NoResize | ImGuiWindowFlags_NoScrollbar | ImGuiWindowFlags_NoInputs | ImGuiWindowFlags_NoSavedSettings | ImGuiWindowFlags_NoFocusOnAppearing | ImGuiWindowFlags_NoBringToFrontOnFocus;
ImGui::SetNextWindowSize(io.DisplaySize);
ImGui::PushStyleColor(ImGuiCol_WindowBg, 0);
ImGui::Begin("gizmo", NULL, flags);
gContext->mDrawList = ImGui::GetWindowDrawList();
ImGui::End();
ImGui::PopStyleColor();
}
bool IsUsing()
{
return gContext->mbUsing||gContext->mbUsingBounds;
}
int GetAxis()
{
if (IsUsing())
{
if (gContext->mbUsing)
{
return gContext->mCurrentOperation; //??
//return gContext->mMoveType;
//auto r = GetMoveType(NULL);
//if (r != NONE)
// return r;
//r = GetRotateType();
//if (r != NONE)
// return r;
//r = GetScaleType();
//if (r != NONE)
// return r;
}
}
return 0;
}
bool IsOver()
{
return (GetMoveType(NULL) != NONE) || GetRotateType() != NONE || GetScaleType() != NONE || IsUsing();
}
void Enable(bool enable)
{
gContext->mbEnable = enable;
if (!enable)
{
gContext->mbUsing = false;
gContext->mbUsingBounds = false;
}
}
static float GetUniform(const vec_t& position, const matrix_t& mat)
{
vec_t trf = makeVect(position.x, position.y, position.z, 1.f);
trf.Transform(mat);
return trf.w;
}
static void ComputeContext(const float *view, const float *projection, float *matrix, MODE mode)
{
gContext->mMode = mode;
gContext->mViewMat = *(matrix_t*)view;
gContext->mProjectionMat = *(matrix_t*)projection;
if (mode == LOCAL)
{
gContext->mModel = *(matrix_t*)matrix;
gContext->mModel.OrthoNormalize();
}
else
{
gContext->mModel.Translation(((matrix_t*)matrix)->v.position);
}
gContext->mModelSource = *(matrix_t*)matrix;
gContext->mModelScaleOrigin.Set(gContext->mModelSource.v.right.Length(), gContext->mModelSource.v.up.Length(), gContext->mModelSource.v.dir.Length());
gContext->mModelInverse.Inverse(gContext->mModel);
gContext->mModelSourceInverse.Inverse(gContext->mModelSource);
gContext->mViewProjection = gContext->mViewMat * gContext->mProjectionMat;
gContext->mMVP = gContext->mModel * gContext->mViewProjection;
matrix_t viewInverse;
viewInverse.Inverse(gContext->mViewMat);
gContext->mCameraDir = viewInverse.v.dir;
gContext->mCameraEye = viewInverse.v.position;
gContext->mCameraRight = viewInverse.v.right;
gContext->mCameraUp = viewInverse.v.up;
gContext->mScreenFactor = 0.1f * GetUniform(gContext->mModel.v.position, gContext->mViewProjection);
ImVec2 centerSSpace = worldToPos(makeVect(0.f, 0.f), gContext->mMVP);
gContext->mScreenSquareCenter = centerSSpace;
gContext->mScreenSquareMin = ImVec2(centerSSpace.x - 5.f, centerSSpace.y - 5.f);
gContext->mScreenSquareMax = ImVec2(centerSSpace.x + 10.f, centerSSpace.y + 10.f);
ComputeCameraRay(gContext->mRayOrigin, gContext->mRayVector);
}
static void ComputeColors(ImU32 *colors, int type, OPERATION operation)
{
static GlowAnimTimer glowAnim;
glowAnim.currentTime_ = ImGui::GetTime();
ImColor selCol(selectionColor);
ImVec4 selV(selCol);
static auto Lerp = [](const ImVec4& lhs, const ImVec4& rhs, float td) {
return ImColor(ImVec4(
lhs.x + td * (rhs.x - lhs.x),
lhs.y + td * (rhs.y - lhs.y),
lhs.z + td * (rhs.z - lhs.z),
lhs.w + td * (rhs.w - lhs.w)));
};
#define GLOW_ANIM(A) Lerp(ImColor(A), selV, glowAnim.GetTimeCurve())
if (gContext->mbEnable)
{
switch (operation)
{
case TRANSLATE:
colors[0] = (type == MOVE_SCREEN) ? selectionColor : 0xFFFFFFFF;
for (int i = 0; i < 3; i++)
{
int colorPlaneIndex = (i + 2) % 3;
colors[i + 1] = (type == (int)(MOVE_X + i)) || type == MOVE_SCREEN ? GLOW_ANIM(directionColor[i]) : directionColor[i];
colors[i + 4] = (type == (int)(MOVE_XY + i)) ? GLOW_ANIM(planeColor[colorPlaneIndex]) : planeColor[colorPlaneIndex];
colors[i + 4] = (type == MOVE_SCREEN) ? GLOW_ANIM(colors[i+4]) : colors[i + 4];
}
break;
case ROTATE:
colors[0] = (type == ROTATE_SCREEN) ? GLOW_ANIM(0xFFFF55FF) : 0xFFFF55FF;
for (int i = 0; i < 3; i++)
colors[i + 1] = (type == (int)(ROTATE_X + i)) ? GLOW_ANIM(directionColor[i]) : directionColor[i];
break;
case SCALE:
colors[0] = (type == SCALE_XYZ) ? GLOW_ANIM(0xFFFFFFFF) : 0xFFFFFFFF;
for (int i = 0; i < 3; i++)
{
int colorPlaneIndex = (i + 2) % 3;
colors[i + 1] = (type == (int)(SCALE_X + i) || type == SCALE_XYZ) ? GLOW_ANIM(directionColor[i]) : directionColor[i];
static const int Remapping[] = { SCALE_XY, SCALE_YZ, SCALE_XZ };
colors[i + 4] = (type == Remapping[i]) ? GLOW_ANIM(planeColor[colorPlaneIndex]) : planeColor[colorPlaneIndex];
colors[i + 4] = (type == SCALE_XYZ) ? GLOW_ANIM(colors[i+4]) : colors[i + 4];
}
break;
}
}
else
{
for (int i = 0; i < 7; i++)
colors[i] = inactiveColor;
}
}
static void ComputeTripodAxisAndVisibility(int axisIndex, vec_t& dirPlaneX, vec_t& dirPlaneY, bool& belowAxisLimit, bool& belowPlaneLimit)
{
const int planNormal = (axisIndex + 2) % 3;
dirPlaneX = directionUnary[axisIndex];
dirPlaneY = directionUnary[(axisIndex + 1) % 3];
if (gContext->mbUsing)
{
// when using, use stored factors so the gizmo doesn't flip when we translate
belowAxisLimit = gContext->mBelowAxisLimit[axisIndex];
belowPlaneLimit = gContext->mBelowPlaneLimit[axisIndex];
dirPlaneX *= gContext->mAxisFactor[axisIndex];
dirPlaneY *= gContext->mAxisFactor[(axisIndex + 1) % 3];
}
else
{
vec_t dirPlaneNormalWorld;
dirPlaneNormalWorld.TransformVector(directionUnary[planNormal], gContext->mModel);
dirPlaneNormalWorld.Normalize();
vec_t dirPlaneXWorld(dirPlaneX);
dirPlaneXWorld.TransformVector(gContext->mModel);
dirPlaneXWorld.Normalize();
vec_t dirPlaneYWorld(dirPlaneY);
dirPlaneYWorld.TransformVector(gContext->mModel);
dirPlaneYWorld.Normalize();
vec_t cameraEyeToGizmo = Normalized(gContext->mModel.v.position - gContext->mCameraEye);
float dotCameraDirX = cameraEyeToGizmo.Dot3(dirPlaneXWorld);
float dotCameraDirY = cameraEyeToGizmo.Dot3(dirPlaneYWorld);
// compute factor values
float mulAxisX = (dotCameraDirX > 0.f) ? -1.f : 1.f;
float mulAxisY = (dotCameraDirY > 0.f) ? -1.f : 1.f;
dirPlaneX *= mulAxisX;
dirPlaneY *= mulAxisY;
belowAxisLimit = fabsf(dotCameraDirX) < angleLimit;
belowPlaneLimit = (fabsf(cameraEyeToGizmo.Dot3(dirPlaneNormalWorld)) > planeLimit);
// and store values
gContext->mAxisFactor[axisIndex] = mulAxisX;
gContext->mAxisFactor[(axisIndex+1)%3] = mulAxisY;
gContext->mBelowAxisLimit[axisIndex] = belowAxisLimit;
gContext->mBelowPlaneLimit[axisIndex] = belowPlaneLimit;
}
}
static void ComputeSnap(float*value, float snap)
{
if (snap <= FLT_EPSILON)
return;
float modulo = fmodf(*value, snap);
float moduloRatio = fabsf(modulo) / snap;
if (moduloRatio < snapTension)
*value -= modulo;
else if (moduloRatio >(1.f - snapTension))
*value = *value - modulo + snap * ((*value<0.f) ? -1.f : 1.f);
}
static void ComputeSnap(vec_t& value, float *snap)
{
for (int i = 0; i < 3; i++)
{
ComputeSnap(&value[i], snap[i]);
}
}
static float ComputeAngleOnPlan()
{
const float len = IntersectRayPlane(gContext->mRayOrigin, gContext->mRayVector, gContext->mTranslationPlan);
vec_t localPos = Normalized(gContext->mRayOrigin + gContext->mRayVector * len - gContext->mModel.v.position);
vec_t perpendicularVector;
perpendicularVector.Cross(gContext->mRotationVectorSource, gContext->mTranslationPlan);
perpendicularVector.Normalize();
float acosAngle = Clamp(Dot(localPos, gContext->mRotationVectorSource), -0.9999f, 0.9999f);
float angle = acosf(acosAngle);
angle *= (Dot(localPos, perpendicularVector) < 0.f) ? 1.f : -1.f;
return angle;
}