williamjcm/Pokitto-Raycasting
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This commit is contained in:
Miloslav Číž 2018-09-15 15:31:57 +02:00
parent 93bb145d48
commit 567ad36e55
1 changed files with 12 additions and 14 deletions
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26
demo1.cpp
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@ -949,12 +949,15 @@ const unsigned char spriteTorch2[] =
const unsigned char *textures[] = {texture1, texture2, texture3, texture4};
#define withinMapReturn(what,whatElse)\
int16_t index = (LEVEL_Y_RES - y - 1) * LEVEL_X_RES + x;\
if (index > 0 && index < LEVEL_Y_RES * LEVEL_X_RES)\
return (what);\
return (whatElse);
Unit textureAt(int16_t x, int16_t y)
{
if (x >= 0 && x < LEVEL_X_RES && y >= 0 && y < LEVEL_Y_RES)
return levelTexture[(LEVEL_Y_RES - y -1) * LEVEL_X_RES + x];
return 0;
withinMapReturn(levelTexture[index],0)
}
Unit floorHeightAt(int16_t x, int16_t y)
@ -963,22 +966,17 @@ Unit floorHeightAt(int16_t x, int16_t y)
return
((absVal(-1 * (pokitto.frameCount % 64) + 32)) * UNITS_PER_SQUARE) / 8;
if (x >= 0 && x < LEVEL_X_RES && y >= 0 && y < LEVEL_Y_RES)
return (levelFloor[(LEVEL_Y_RES - y -1) * LEVEL_X_RES + x] * UNITS_PER_SQUARE) / 8;
return 0;
withinMapReturn((levelFloor[index] * UNITS_PER_SQUARE) / 8,0)
}
Unit ceilingHeightAt(int16_t x, int16_t y)
{
signed char v = 127;
if (x >= 0 && x < LEVEL_X_RES && y >= 0 && y < LEVEL_Y_RES)
v = levelCeiling[(LEVEL_Y_RES - y -1) * LEVEL_X_RES + x];
return (v * UNITS_PER_SQUARE) / 8;
withinMapReturn(levelCeiling[index] * UNITS_PER_SQUARE / 8,
127 * UNITS_PER_SQUARE / 8)
}
#undef withinMapReturn
/**
Function for drawing a single pixel (like fragment shader). Bottleneck =>
should be as fast as possible.