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Start block shapes

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This commit is contained in:
Miloslav Ciz 2024-07-22 01:16:16 +02:00
parent 84163d0d3c
commit 9e3bf000cf
8 changed files with 217 additions and 67 deletions
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57
map.h
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@ -76,8 +76,8 @@
#define LCR_BLOCK_LEFT_FRONT 0x03 ///< filled left front quarter of block
#define LCR_BLOCK_BOTTOM_LEFT 0x04 ///< filled bottom left quarter of block
#define LCR_BLOCK_CHECKPOINT_NOT 0x10 ///< checkpoint, not taken
#define LCR_BLOCK_CHECKPOINT_YES 0x11 ///< checkpoint, taken
#define LCR_BLOCK_CHECKPOINT_0 0x10 ///< checkpoint, not taken
#define LCR_BLOCK_CHECKPOINT_1 0x11 ///< checkpoint, taken
#define LCR_BLOCK_FINISH 0x12 ///< finish
// special blocks:
@ -274,18 +274,57 @@ const uint8_t *LCR_mapGetBlockAt(uint8_t x, uint8_t y, uint8_t z)
return 0;
}
void _LCR_addBlockShapeByte(uint8_t *bytes, uint8_t *byteCount,
int x, int y, int z)
{
if (*byteCount >= LCR_MAP_BLOCK_SHAPE_MAX_BYTES)
return;
bytes[*byteCount] = (5 * 7) * z + 7 * y + x;
*byteCount += 1;
}
/**
Gets a shape of given map block type as a 3D model composed of triangles. The
model is returned as an array of 16 bit ints, each of which represents
X with lowest 5 bits, Y with next 5 bits and Z with next 5 bits (the
directions of axes are same as map X, Y, Z directions). Each coordinate can
go from 0 to 16; WATCH OUT, THIS IS 17 VALUES, NOT 16, so as to allow having
a mid coord (8), mid-mid coords (4, 12) and mid-mid-mid coords.
model is returned as an array of byte triplets (triangles), with each byte
representing one coordinate. These coordinates can be decoded with
LCR_decodeMapBlockCoords function.
*/
void LCR_mapGetBlockShape(uint8_t blockType, uint8_t transform,
uint16_t triangles[LCR_MAP_BLOCK_SHAPE_MAX_TRIANGLES * 3],
uint8_t *triangleCount)
uint8_t bytes[LCR_MAP_BLOCK_SHAPE_MAX_BYTES], uint8_t *byteCount)
{
/*
The coordinate format is following: byte B specifies coordinates X (0 to 6)
= B % 7, Y (vertical, 0 to 4) = (B / 7) % 5, Z (0 to 6) = B % 35.
*/
*byteCount = 0;
switch (blockType)
{
case LCR_BLOCK_FULL:
default:
_LCR_addBlockShapeByte(bytes,byteCount,0,0,1);
_LCR_addBlockShapeByte(bytes,byteCount,5,0,1);
_LCR_addBlockShapeByte(bytes,byteCount,0,1,3);
break;
}
}
/**
Decodes XYZ coordinates encoded in a byte returned by LCR_mapGetBlockShape.
Each coordinate will be in range 0 to 12 (including both). This unusual range
is intentional as it for example has an exact mid value.
*/
void LCR_decodeMapBlockCoords(uint8_t byte, uint8_t *x, uint8_t *y, uint8_t *z)
{
*x = (byte % 7) * 2;
*y = ((byte / 7) % 5) * 3;
*z = (byte % 35) * 2;
}
#endif // guard