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Diffstat (limited to 'apps/graphics/traveler/tools/misc/mktrig.c')
-rw-r--r-- | apps/graphics/traveler/tools/misc/mktrig.c | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/apps/graphics/traveler/tools/misc/mktrig.c b/apps/graphics/traveler/tools/misc/mktrig.c new file mode 100644 index 000000000..6d5d89848 --- /dev/null +++ b/apps/graphics/traveler/tools/misc/mktrig.c @@ -0,0 +1,188 @@ + +/******************************************************************************* + * apps/graphics/traveler/tools/misc/mktrig.c + * + * Copyright (C) 2014 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <gnutt@nuttx.org> + * + * 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. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * 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 OWNER 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. + * + ****************************************************************************/ + +/**************************************************************************** + * Included files + ****************************************************************************/ + +#include <stdint.h> +#include <stdio.h> +#include <stdlib.h> +#include <math.h> + +/**************************************************************************** + * Included files + ****************************************************************************/ + +#define PI 3.1415926 + +/**************************************************************************** + * Included files + ****************************************************************************/ + +int main(int argc, char **argv, char **envp) +{ + FILE *outfile; + double angle; + double valuef; + uint32_t value32; + uint16_t value16; + int i; + int j; + + outfile = fopen("trigtbl.tmp", "w"); + if (!outfile) + { + fprintf(stderr, "Unable to open trigtbl.tmp\n"); + exit(1); + } + + fprintf(outfile, "#define TWOPI 1920\n"); + fprintf(outfile, "#define PI 960\n"); + fprintf(outfile, "#define HALFPI 480\n"); + fprintf(outfile, "#define QTRPI 240\n\n"); + + fprintf(outfile, "const int32_t g_tan_table[PI + HALFPI + 1] =\n"); + fprintf(outfile, "{\n"); + + for (i = 0; i < 1440;) + { + fprintf(outfile, " "); + for (j = 0; ((j < 5) && (i < 1440));) + { + angle = ((double)i) * (2.0 * PI / 1920.0); + valuef = (4096.0 * tan(angle)); + if (valuef >= 0.0) + { + valuef += 0.5; + } + else + { + valuef -= 0.5; + } + + value32 = (uint32_t)((long)(valuef)); + fprintf(outfile, "0x%08lx", (unsigned long)value32); + + i++; + j++; + if ((j < 5) && (i < 1440)) + { + fprintf(outfile, ", "); + } + } + + fprintf(outfile, ",\n"); + } + + fprintf(outfile, " 0x00000000\n"); + fprintf(outfile, "};\n\n"); + + fprintf(outfile, "const int16_t g_sin_table[TWOPI + HALFPI + 1] =\n"); + fprintf(outfile, "{\n"); + + for (i = 0; i < 2400;) + { + fprintf(outfile, " "); + for (j = 0; ((j < 8) && (i < 2400));) + { + angle = ((double)i) * (2.0 * PI / 1920.0); + valuef = (4096.0 * sin(angle)); + if (valuef >= 0.0) + { + valuef += 0.5; + } + else + { + valuef -= 0.5; + } + + value16 = (uint16_t)((long)(valuef)); + fprintf(outfile, "0x%04x", (unsigned int)value16); + + i++; + j++; + if ((j < 8) && (i < 2400)) + { + fprintf(outfile, ", "); + } + } + + fprintf(outfile, ",\n"); + } + + fprintf(outfile, " 0x1000\n"); + fprintf(outfile, "};\n\n"); + + fprintf(outfile, "const int32_t cscTable[TWOPI + HALFPI + 1] =\n"); + fprintf(outfile, "{\n"); + + for (i = 0; i < 2400;) + { + fprintf(outfile, " "); + for (j = 0; ((j < 5) && (i < 2400));) + { + angle = ((double)i) * (2.0 * PI / 1920.0); + valuef = (4096.0 / sin(angle)); + if (valuef >= 0.0) + { + valuef += 0.5; + } + else + { + valuef -= 0.5; + } + + value32 = (uint32_t)((long)(valuef)); + fprintf(outfile, "0x%08lx", (unsigned long)value32); + + i++; + j++; + if ((j < 5) && (i < 2400)) + { + fprintf(outfile, ", "); + } + } + + fprintf(outfile, ",\n"); + } + + fprintf(outfile, " 0x00001000\n"); + fprintf(outfile, "};\n\n"); + + fclose(outfile); + return 0; +} |