1 files changed, 218 insertions, 0 deletions
diff --git a/source/blender/blenlib/BLI_float2.hh b/source/blender/blenlib/BLI_float2.hh
new file mode 100644
index 00000000000..bb4229db86e
--- /dev/null
+++ b/source/blender/blenlib/BLI_float2.hh
@@ -0,0 +1,218 @@
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#pragma once
+
+#include "BLI_float3.hh"
+
+namespace blender {
+
+struct float2 {
+  float x, y;
+
+  float2() = default;
+
+  float2(const float *ptr) : x{ptr[0]}, y{ptr[1]}
+  {
+  }
+
+  explicit float2(float value) : x(value), y(value)
+  {
+  }
+
+  explicit float2(int value) : x(value), y(value)
+  {
+  }
+
+  float2(float x, float y) : x(x), y(y)
+  {
+  }
+
+  float2(const float3 &other) : x(other.x), y(other.y)
+  {
+  }
+
+  operator float *()
+  {
+    return &x;
+  }
+
+  operator const float *() const
+  {
+    return &x;
+  }
+
+  float length() const
+  {
+    return len_v2(*this);
+  }
+
+  float length_squared() const
+  {
+    return len_squared_v2(*this);
+  }
+
+  bool is_zero() const
+  {
+    return this->x == 0.0f && this->y == 0.0f;
+  }
+
+  float2 &operator+=(const float2 &other)
+  {
+    x += other.x;
+    y += other.y;
+    return *this;
+  }
+
+  float2 &operator-=(const float2 &other)
+  {
+    x -= other.x;
+    y -= other.y;
+    return *this;
+  }
+
+  float2 &operator*=(float factor)
+  {
+    x *= factor;
+    y *= factor;
+    return *this;
+  }
+
+  float2 &operator/=(float divisor)
+  {
+    x /= divisor;
+    y /= divisor;
+    return *this;
+  }
+
+  uint64_t hash() const
+  {
+    uint64_t x1 = *reinterpret_cast<const uint32_t *>(&x);
+    uint64_t x2 = *reinterpret_cast<const uint32_t *>(&y);
+    return (x1 * 812519) ^ (x2 * 707951);
+  }
+
+  friend float2 operator+(const float2 &a, const float2 &b)
+  {
+    return {a.x + b.x, a.y + b.y};
+  }
+
+  friend float2 operator-(const float2 &a, const float2 &b)
+  {
+    return {a.x - b.x, a.y - b.y};
+  }
+
+  friend float2 operator-(const float2 &a, const float &b)
+  {
+    return {a.x - b, a.y - b};
+  }
+
+  friend float2 operator*(const float2 &a, float b)
+  {
+    return {a.x * b, a.y * b};
+  }
+
+  friend float2 operator/(const float2 &a, float b)
+  {
+    BLI_assert(b != 0.0f);
+    return {a.x / b, a.y / b};
+  }
+
+  friend float2 operator*(float a, const float2 &b)
+  {
+    return b * a;
+  }
+
+  friend std::ostream &operator<<(std::ostream &stream, const float2 &v)
+  {
+    stream << "(" << v.x << ", " << v.y << ")";
+    return stream;
+  }
+
+  static float2 safe_divide(const float2 &a, const float b)
+  {
+    return (b != 0.0f) ? a / b : float2(0.0f);
+  }
+
+  static float2 floor(const float2 &a)
+  {
+    return float2(floorf(a.x), floorf(a.y));
+  }
+
+  /**
+   * Returns a normalized vector. The original vector is not changed.
+   */
+  float2 normalized() const
+  {
+    float2 result;
+    normalize_v2_v2(result, *this);
+    return result;
+  }
+
+  static float dot(const float2 &a, const float2 &b)
+  {
+    return a.x * b.x + a.y * b.y;
+  }
+
+  static float2 interpolate(const float2 &a, const float2 &b, float t)
+  {
+    return a * (1 - t) + b * t;
+  }
+
+  static float2 abs(const float2 &a)
+  {
+    return float2(fabsf(a.x), fabsf(a.y));
+  }
+
+  static float distance(const float2 &a, const float2 &b)
+  {
+    return (a - b).length();
+  }
+
+  static float distance_squared(const float2 &a, const float2 &b)
+  {
+    float2 diff = a - b;
+    return float2::dot(diff, diff);
+  }
+
+  struct isect_result {
+    enum {
+      LINE_LINE_COLINEAR = -1,
+      LINE_LINE_NONE = 0,
+      LINE_LINE_EXACT = 1,
+      LINE_LINE_CROSS = 2,
+    } kind;
+    float lambda;
+    float mu;
+  };
+
+  static isect_result isect_seg_seg(const float2 &v1,
+                                    const float2 &v2,
+                                    const float2 &v3,
+                                    const float2 &v4);
+
+  friend bool operator==(const float2 &a, const float2 &b)
+  {
+    return a.x == b.x && a.y == b.y;
+  }
+
+  friend bool operator!=(const float2 &a, const float2 &b)
+  {
+    return !(a == b);
+  }
+};
+
+}  // namespace blender