nxglib_vectoradd.c 3.5 KB

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  1. /****************************************************************************
  2. * libs/libnx/nxglib/nxglib_vectoradd.c
  3. *
  4. * Copyright (C) 2008-2011, 2013 Gregory Nutt. All rights reserved.
  5. * Author: Gregory Nutt <gnutt@nuttx.org>
  6. *
  7. * Redistribution and use in source and binary forms, with or without
  8. * modification, are permitted provided that the following conditions
  9. * are met:
  10. *
  11. * 1. Redistributions of source code must retain the above copyright
  12. * notice, this list of conditions and the following disclaimer.
  13. * 2. Redistributions in binary form must reproduce the above copyright
  14. * notice, this list of conditions and the following disclaimer in
  15. * the documentation and/or other materials provided with the
  16. * distribution.
  17. * 3. Neither the name NuttX nor the names of its contributors may be
  18. * used to endorse or promote products derived from this software
  19. * without specific prior written permission.
  20. *
  21. * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22. * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23. * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  24. * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
  25. * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  26. * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  27. * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
  28. * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  29. * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30. * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  31. * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  32. * POSSIBILITY OF SUCH DAMAGE.
  33. *
  34. ****************************************************************************/
  35. /****************************************************************************
  36. * Included Files
  37. ****************************************************************************/
  38. #include <nuttx/config.h>
  39. #include <nuttx/nx/nxglib.h>
  40. /****************************************************************************
  41. * Pre-Processor Definitions
  42. ****************************************************************************/
  43. /****************************************************************************
  44. * Private Types
  45. ****************************************************************************/
  46. /****************************************************************************
  47. * Private Data
  48. ****************************************************************************/
  49. /****************************************************************************
  50. * Public Data
  51. ****************************************************************************/
  52. /****************************************************************************
  53. * Private Functions
  54. ****************************************************************************/
  55. /****************************************************************************
  56. * Public Functions
  57. ****************************************************************************/
  58. /****************************************************************************
  59. * Name: nxgl_vectoradd
  60. *
  61. * Description:
  62. * Add two 2x1 vectors and save the result to a third.
  63. *
  64. ****************************************************************************/
  65. void nxgl_vectoradd(FAR struct nxgl_point_s *dest,
  66. FAR const struct nxgl_point_s *v1,
  67. FAR const struct nxgl_point_s *v2)
  68. {
  69. dest->x = v1->x + v2->x;
  70. dest->y = v1->y + v2->y;
  71. }