penguin86/raycaster
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Better rounding

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This commit is contained in:
Daniele Verducci (Slimpenguin) 2023-01-06 12:40:00 +01:00
parent 7092dfee46
commit 3c927778e2
1 changed files with 11 additions and 5 deletions
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16
v2/raycaster.py
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@ -34,10 +34,10 @@ MAP = [
1, 0, 0, 0, 0, 0, 2, 2, 0, 0, 0, 0, 2, 0, 0, 1, 1, 0, 0, 0, 0, 0, 2, 2, 0, 0, 0, 0, 2, 0, 0, 1,
1, 0, 0, 0, 0, 0, 0, 2, 2, 0, 0, 0, 2, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 2, 2, 0, 0, 0, 2, 0, 0, 1,
1, 0, 0, 0, 0, 0, 0, 0, 2, 2, 2, 2, 2, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 2, 2, 2, 2, 2, 0, 0, 1,
1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
] ]
MAP_SIZE = 16 MAP_SIZE = 16
@ -308,10 +308,16 @@ class Main:
lineOffset = RAYCAST_WIN_HEIGHT / 2 - lineHeight / 2 lineOffset = RAYCAST_WIN_HEIGHT / 2 - lineHeight / 2
# Draw pixels vertically from top to bottom to obtain a line # Draw pixels vertically from top to bottom to obtain a line
textureSegmentEnd = 0
for textureColumnPixel in range(0, TEXTURE_SIZE): for textureColumnPixel in range(0, TEXTURE_SIZE):
# Calc texture segment length on screen # Calc texture segment length on screen
textureSegmentLength = lineHeight / TEXTURE_SIZE textureSegmentLength = lineHeight / TEXTURE_SIZE
textureSegmentStart = lineOffset + textureColumnPixel * textureSegmentLength if textureSegmentEnd == 0:
# First iteration: calculate segment start
textureSegmentStart = lineOffset + textureColumnPixel * textureSegmentLength
else:
# Next iterations: use the previous segment end (avoids rounding errors)
textureSegmentStart = textureSegmentEnd
textureSegmentEnd = textureSegmentStart + textureSegmentLength textureSegmentEnd = textureSegmentStart + textureSegmentLength
# Obtain texture value in the pixel representing the current segment and calculate shading # Obtain texture value in the pixel representing the current segment and calculate shading
if vertDist > horizDist: if vertDist > horizDist: