135 lines
4.8 KiB
C
135 lines
4.8 KiB
C
/****************************************************************************
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* apps/graphics/traveler/include/trv_trigtbl.h
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*
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* Copyright (C) 2014 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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#ifndef __APPS_GRAPHICS_TRAVELER_INCLUDE_TRV_TRIGTBL_H
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#define __APPS_GRAPHICS_TRAVELER_INCLUDE_TRV_TRIGTBL_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include "trv_types.h"
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Angles *******************************************************************/
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/* These are definitions of commonly used angles. */
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#define TWOPI 1920
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#define PI 960
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#define HALFPI 480
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#define QTRPI 240
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/* Here are definitions for those who prefer degrees */
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/* NOTE: ANGLE_60 and ANGLE_30 are special values. They were */
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/* chosen to match the horizontal screen resolution of 320 pixels. */
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/* These, in fact, drive the entire angular measurement system */
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#define ANGLE_0 0
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#define ANGLE_6 32
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#define ANGLE_9 48
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#define ANGLE_30 160
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#define ANGLE_45 240
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#define ANGLE_60 320
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#define ANGLE_90 480
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#define ANGLE_180 960
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#define ANGLE_270 1440
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#define ANGLE_360 1920
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/* Fixed precision definitions **********************************************/
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/* SMALL precision (6 bits past binary point) */
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/* This occurs frequently because each CELL is 64x64 */
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#define sUNITY 64
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#define sHALF 32
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#define sQUARTER 16
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#define sSHIFT 6
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#define sMASK 63
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#define sTRUNC(a) ((a) >> sSHIFT)
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#define sROUND(a) (((a) + sHALF) >> sSHIFT)
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#define sFIX(a) ((a) << sSHIFT)
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#define sSNAP(a) ((a) & (~sMASK))
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#define sFRAC(a) ((a) & sMASK)
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#define sMUL(a,b) (((int32_t)(a) * (int32_t)(b)) >> sSHIFT )
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#define sDIV(a,b) (((int32_t)(a) << sSHIFT) / (b))
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#define sFLOAT(a) ((float)(a) / (float)sUNITY)
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/* DOUBLE precision (12 bits past binary point) */
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/* This precision results when two SMALL precision numbers are multiplied */
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#define dUNITY 4096
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#define dHALF 2048
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#define dSHIFT 12
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#define dMASK 4095
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#define dTRUNC(a) ((a) >> dSHIFT)
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#define dROUND(a) (((a) + dHALF) >> dSHIFT)
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#define dFIX(a) ((a) << dSHIFT)
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#define dSNAP(a) ((a) & (~dMASK))
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#define dFRAC(a) ((a) & dMASK)
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/* TRIPLE precision (18 bits past binary point) */
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/* This precision results when a SMALL and a DOUBLE precision number
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* are multiplied
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*/
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#define tSHIFT 18
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/* QUAD precision (24 bits past binary point) */
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/* This precision results when two DOUBLE precision numbers are multiplied */
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#define qSHIFT 24
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/* BIG precision (16 bits past binary point) */
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/* This is convenient precision because it is easy to extract the integer
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* portion without shifting or masking
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*/
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#define bUNITY 65536
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#define bHALF 32768
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#define bSHIFT 16
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#define bMASK 65535
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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#endif /* __APPS_GRAPHICS_TRAVELER_INCLUDE_TRV_TRIGTBL_H */
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