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+/*
+ * Copyright (c) 2020, Stephan Unverwerth <s.unverwerth@gmx.de>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ * list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+
+#include <math.h>
+
+namespace Gfx {
+template<typename T>
+class Vector3 {
+public:
+ Vector3() = default;
+ Vector3(T x, T y, T z)
+ : m_x(x)
+ , m_y(y)
+ , m_z(z)
+ {
+ }
+
+ T x() const { return m_x; }
+ T y() const { return m_y; }
+ T z() const { return m_z; }
+
+ void set_x(T value) { m_x = value; }
+ void set_y(T value) { m_y = value; }
+ void set_z(T value) { m_z = value; }
+
+ Vector3 operator+(const Vector3& other) const
+ {
+ return Vector3(m_x + other.m_x, m_y + other.m_y, m_z + other.m_z);
+ }
+
+ Vector3 operator-(const Vector3& other) const
+ {
+ return Vector3(m_x - other.m_x, m_y - other.m_y, m_z - other.m_z);
+ }
+
+ Vector3 operator*(T f) const
+ {
+ return Vector3(m_x * f, m_y * f, m_z * f);
+ }
+
+ Vector3 operator/(T f) const
+ {
+ return Vector3(m_x / f, m_y / f, m_z / f);
+ }
+
+ T dot(const Vector3& other) const
+ {
+ return m_x * other.m_x + m_y * other.m_y + m_z * other.m_z;
+ }
+
+ Vector3 cross(const Vector3& other) const
+ {
+ return Vector3(
+ m_y * other.m_z - m_z * other.m_y,
+ m_z * other.m_x - m_x * other.m_z,
+ m_x * other.m_y - m_y * other.m_x);
+ }
+
+ Vector3 normalized() const
+ {
+ T inv_length = 1 / length();
+ return *this * inv_length;
+ }
+
+ void normalize()
+ {
+ T inv_length = 1 / length();
+ m_x *= inv_length;
+ m_y *= inv_length;
+ m_z *= inv_length;
+ }
+
+ T length() const
+ {
+ return sqrt(m_x * m_x + m_y * m_y + m_z * m_z);
+ }
+
+private:
+ T m_x;
+ T m_y;
+ T m_z;
+};
+
+typedef Vector3<float> FloatVector3;
+typedef Vector3<double> DoubleVector3;
+
+}
+
+using Gfx::DoubleVector3;
+using Gfx::FloatVector3;
+using Gfx::Vector3;