kc3-lang/angle/samples/sample_util/Vector.cpp

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  Commit

• Author : Geoff Lang
  Date : 2015-04-22 11:00:41
  Hash : 413fd933
  Message : Move all GLES samples into the samples directory. There was no real reason to keep them in an angle directory and it makes the generated projects nicer. BUG=angleproject:981 Change-Id: I844e44dc5c2df51f5292cff4bdffe5e951745aae Reviewed-on: https://chromium-review.googlesource.com/266871 Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Brandon Jones <bajones@chromium.org> Tested-by: Geoff Lang <geofflang@chromium.org>

• samples/sample_util/Vector.cpp

• //
  // Copyright (c) 2014 The ANGLE Project Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  //
  
  #include "Vector.h"
  
  #include <math.h>
  
  Vector2::Vector2()
      : x(0.0),
        y(0.0)
  {
  }
  
  Vector2::Vector2(float x, float y)
      : x(x),
        y(y)
  {
  }
  
  float Vector2::length(const Vector2 &vec)
  {
      float lenSquared = lengthSquared(vec);
      return (lenSquared != 0.0f) ? sqrt(lenSquared) : 0.0f;
  }
  
  float Vector2::lengthSquared(const Vector2 &vec)
  {
      return vec.x * vec.x +
             vec.y * vec.y;
  }
  
  Vector2 Vector2::normalize(const Vector2 &vec)
  {
      Vector2 ret(0.0f, 0.0f);
      float len = length(vec);
      if (len != 0.0f)
      {
          float invLen = 1.0f / len;
          ret.x = vec.x * invLen;
          ret.y = vec.y * invLen;
      }
      return ret;
  }
  
  Vector3::Vector3()
      : x(0.0),
        y(0.0),
        z(0.0)
  {
  }
  
  Vector3::Vector3(float x, float y, float z)
      : x(x),
        y(y),
        z(z)
  {
  }
  
  float Vector3::length(const Vector3 &vec)
  {
      float lenSquared = lengthSquared(vec);
      return (lenSquared != 0.0f) ? sqrt(lenSquared) : 0.0f;
  }
  
  float Vector3::lengthSquared(const Vector3 &vec)
  {
      return vec.x * vec.x +
             vec.y * vec.y +
             vec.z * vec.z;
  }
  
  Vector3 Vector3::normalize(const Vector3 &vec)
  {
      Vector3 ret(0.0f, 0.0f, 0.0f);
      float len = length(vec);
      if (len != 0.0f)
      {
          float invLen = 1.0f / len;
          ret.x = vec.x * invLen;
          ret.y = vec.y * invLen;
          ret.z = vec.z * invLen;
      }
      return ret;
  }
  
  float Vector3::dot(const Vector3 &a, const Vector3 &b)
  {
      return a.x * b.x +
             a.y * b.y +
             a.z * b.z;
  }
  
  Vector3 Vector3::cross(const Vector3 &a, const Vector3 &b)
  {
      return Vector3(a.y * b.z - a.z * b.y,
                     a.z * b.x - a.x * b.z,
                     a.x * b.y - a.y * b.x);
  }
  
  Vector3 operator*(const Vector3 &a, const Vector3 &b)
  {
      return Vector3(a.x * b.x,
                     a.y * b.y,
                     a.z * b.z);
  }
  
  Vector3 operator*(const Vector3 &a, const float& b)
  {
      return Vector3(a.x * b,
                     a.y * b,
                     a.z * b);
  }
  
  Vector3 operator/(const Vector3 &a, const Vector3 &b)
  {
      return Vector3(a.x / b.x,
                     a.y / b.y,
                     a.z / b.z);
  }
  
  Vector3 operator/(const Vector3 &a, const float& b)
  {
      return Vector3(a.x / b,
                     a.y / b,
                     a.z / b);
  }
  
  Vector3 operator+(const Vector3 &a, const Vector3 &b)
  {
      return Vector3(a.x + b.x,
                     a.y + b.y,
                     a.z + b.z);
  }
  
  Vector3 operator-(const Vector3 &a, const Vector3 &b)
  {
      return Vector3(a.x - b.x,
                     a.y - b.y,
                     a.z - b.z);
  }
  
  Vector4::Vector4()
      : x(0.0f),
        y(0.0f),
        z(0.0f),
        w(0.0f)
  {
  }
  
  Vector4::Vector4(float x, float y, float z, float w)
      : x(x),
        y(y),
        z(z),
        w(w)
  {
  }
  
  float Vector4::length(const Vector4 &vec)
  {
      float lenSquared = lengthSquared(vec);
      return (lenSquared != 0.0f) ? sqrt(lenSquared) : 0.0f;
  }
  
  float Vector4::lengthSquared(const Vector4 &vec)
  {
      return vec.x * vec.x +
             vec.y * vec.y +
             vec.z * vec.z +
             vec.w * vec.w;
  }
  
  Vector4 Vector4::normalize(const Vector4 &vec)
  {
      Vector4 ret(0.0f, 0.0f, 0.0f, 1.0f);
      if (vec.w != 0.0f)
      {
          float invLen = 1.0f / vec.w;
          ret.x = vec.x * invLen;
          ret.y = vec.y * invLen;
          ret.z = vec.z * invLen;
      }
      return ret;
  }
  
  float Vector4::dot(const Vector4 &a, const Vector4 &b)
  {
      return a.x * b.x +
             a.y * b.y +
             a.z * b.z +
             a.w * b.w;
  }