forked from tas/major_tom
Add spatial audio, spacecraft entity, and level intro sequence
Distance-based sound effects with stereo panning for explosions, impacts, and pickups. Spacecraft entity with full state machine (fly-in, land, take off, fly-out), engine/synth sound loops, thruster particles, and PNG spritesheet. Moon level intro defers player spawn until ship lands. Also untrack build/ objects that were committed by mistake.
This commit is contained in:
Thomas
360
tools/gen_spacecraft.py
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360
tools/gen_spacecraft.py
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#!/usr/bin/env python3
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"""Generate spacecraft spritesheet PNG for the JNR engine.
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Output: assets/sprites/spacecraft.png
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Layout: 5 frames horizontally, each 80x48 pixels = 400x48 total
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Frames: landed, landing1, landing2, landing3, landing4
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The ship faces RIGHT, uses the game's pixel art color palette.
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"""
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from PIL import Image
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# ── Color palette (RGBA) ─────────────────────────────
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T = (0, 0, 0, 0) # transparent
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BLK = (26, 26, 46, 255) # dark/outline
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WHT = (238, 238, 234, 255) # white
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GRY = (136, 136, 136, 255) # grey
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GYD = (85, 85, 85, 255) # grey dark
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GYL = (187, 187, 187, 255) # grey light
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BLU = (74, 124, 189, 255) # blue accent
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BLD = (54, 94, 143, 255) # blue dark
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BLL = (111, 168, 220, 255) # blue light
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CYN = (77, 208, 225, 255) # cyan cockpit
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CYD = (0, 172, 193, 255) # cyan dark
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ORG = (255, 152, 0, 255) # orange
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ORD = (204, 122, 0, 255) # orange dark
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YLW = (255, 213, 79, 255) # yellow
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RED = (217, 68, 68, 255) # red
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W, H = 80, 48 # frame size
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def make_frame():
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"""Return a blank 80x48 pixel grid."""
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return [[T] * W for _ in range(H)]
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def hline(grid, y, x0, x1, color):
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"""Draw horizontal line from x0 to x1 inclusive."""
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if y < 0 or y >= H:
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return
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for x in range(max(0, x0), min(W, x1 + 1)):
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grid[y][x] = color
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def pixel(grid, x, y, color):
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"""Set a single pixel."""
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if 0 <= x < W and 0 <= y < H:
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grid[y][x] = color
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def draw_ship_body(grid, oy=0):
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"""Draw the main spacecraft hull, offset vertically by oy pixels.
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Ship anatomy (facing right):
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- Engine block: cols 10-18, thick rear
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- Main fuselage: cols 18-58, ~10px tall
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- Cockpit: cols 58-66, with CYN canopy
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- Nose: cols 66-72, pointed tip
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- Upper fin: cols 22-38, extends upward
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- Lower fin: cols 22-38, extends downward
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"""
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cy = 23 + oy # vertical center of fuselage
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# ── Main fuselage (rows cy-5 to cy+4 = 10px tall) ──
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for dy in range(-5, 5):
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y = cy + dy
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# Fuselage hull
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if dy == -5:
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# Top edge — light highlight
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hline(grid, y, 20, 60, GYL)
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elif dy == 4:
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# Bottom edge — dark shadow
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hline(grid, y, 20, 60, BLK)
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elif dy == -4:
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hline(grid, y, 18, 62, GYL)
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elif dy == 3:
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hline(grid, y, 18, 62, GYD)
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elif dy == -1 or dy == 0:
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# Blue racing stripe through center
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hline(grid, y, 16, 64, BLU)
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elif dy == -2:
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hline(grid, y, 17, 63, GRY)
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elif dy == 1:
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hline(grid, y, 17, 63, GRY)
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elif dy == 2:
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hline(grid, y, 18, 62, GYD)
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elif dy == -3:
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hline(grid, y, 19, 61, GRY)
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# ── Engine block (rear, left side) ──
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for dy in range(-6, 7):
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y = cy + dy
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if -6 <= dy <= 6:
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# Engine nacelle housing
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if abs(dy) <= 3:
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hline(grid, y, 10, 18, GYD)
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elif abs(dy) <= 5:
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hline(grid, y, 12, 18, GYD)
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elif abs(dy) == 6:
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hline(grid, y, 14, 17, GYD)
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# Engine inner dark (thruster openings)
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for dy in range(-3, 4):
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y = cy + dy
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if abs(dy) <= 2:
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hline(grid, y, 10, 12, BLK)
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elif abs(dy) == 3:
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pixel(grid, 11, y, BLK)
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pixel(grid, 12, y, BLK)
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# Engine highlight on top
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hline(grid, cy - 4, 13, 17, GRY)
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hline(grid, cy - 5, 14, 17, GRY)
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# ── Cockpit canopy ──
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# Canopy frame (CYD) and glass (CYN)
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for dy in range(-4, 3):
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y = cy + dy
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if dy == -4:
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hline(grid, y, 58, 63, CYD)
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elif dy == -3:
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hline(grid, y, 59, 65, CYD)
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hline(grid, y, 60, 64, CYN)
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elif dy == -2:
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hline(grid, y, 60, 66, CYD)
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hline(grid, y, 61, 65, CYN)
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pixel(grid, 63, y, WHT) # glint
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elif dy == -1:
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hline(grid, y, 61, 67, CYD)
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hline(grid, y, 62, 66, CYN)
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elif dy == 0:
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hline(grid, y, 61, 67, CYD)
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hline(grid, y, 62, 66, CYN)
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pixel(grid, 64, y, WHT) # glint
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elif dy == 1:
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hline(grid, y, 60, 66, CYD)
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hline(grid, y, 61, 65, CYN)
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elif dy == 2:
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hline(grid, y, 58, 64, CYD)
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# ── Nose (pointed tip facing right) ──
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for dy in range(-3, 4):
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y = cy + dy
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if dy == 0:
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hline(grid, y, 66, 73, GYL) # center line
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elif abs(dy) == 1:
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hline(grid, y, 66, 71, GRY)
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elif abs(dy) == 2:
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hline(grid, y, 65, 69, GYD)
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elif abs(dy) == 3:
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hline(grid, y, 65, 67, BLK)
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# Nose tip highlight
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pixel(grid, 73, cy, WHT)
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pixel(grid, 72, cy, WHT)
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# ── Upper wing fin ──
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for i in range(8):
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y = cy - 6 - i
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x0 = 26 + i
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x1 = 40 - i
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if x0 <= x1:
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hline(grid, y, x0, x1, GYD)
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# Highlight top edge
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if i < 7:
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pixel(grid, x0, y, GYL)
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# BLU accent
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if x1 - x0 > 2:
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pixel(grid, (x0 + x1) // 2, y, BLU)
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# Wing fin tip accent
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pixel(grid, 33, cy - 13, BLU)
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# ── Lower wing fin ──
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for i in range(8):
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y = cy + 5 + i
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x0 = 26 + i
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x1 = 40 - i
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if x0 <= x1:
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hline(grid, y, x0, x1, GYD)
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# Shadow bottom edge
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if i < 7:
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pixel(grid, x0, y, BLK)
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# BLU accent
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if x1 - x0 > 2:
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pixel(grid, (x0 + x1) // 2, y, BLD)
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# ── Panel detail lines ──
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for dy in [-3, 2]:
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y = cy + dy
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for x in [30, 42, 52]:
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pixel(grid, x, y, GYD if dy < 0 else BLK)
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def draw_landing_gear(grid, oy=0, length=4):
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"""Draw two landing gear struts below the hull."""
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cy = 23 + oy
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gear_top = cy + 5 # just below hull bottom
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# Front gear (col 52)
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for dy in range(length):
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y = gear_top + dy
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pixel(grid, 52, y, GYD)
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pixel(grid, 53, y, GYD)
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# Foot
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hline(grid, gear_top + length, 51, 54, BLK)
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# Rear gear (col 26)
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for dy in range(length):
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y = gear_top + dy
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pixel(grid, 26, y, GYD)
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pixel(grid, 27, y, GYD)
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# Foot
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hline(grid, gear_top + length, 25, 28, BLK)
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def draw_thrusters(grid, oy=0, intensity=0):
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"""Draw thruster flames behind the engine.
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intensity: 0=off, 1=dim, 2=medium, 3=bright
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"""
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if intensity == 0:
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return
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cy = 23 + oy
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if intensity >= 3:
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# Bright: long flame with white core
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for dy in range(-2, 3):
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y = cy + dy
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if abs(dy) == 0:
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hline(grid, y, 1, 9, YLW)
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hline(grid, y, 3, 7, WHT)
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elif abs(dy) == 1:
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hline(grid, y, 3, 9, ORG)
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hline(grid, y, 4, 8, YLW)
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elif abs(dy) == 2:
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hline(grid, y, 5, 9, ORD)
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# Flame tip flicker
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pixel(grid, 1, cy, WHT)
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pixel(grid, 2, cy, YLW)
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elif intensity >= 2:
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# Medium flame
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for dy in range(-1, 2):
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y = cy + dy
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if dy == 0:
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hline(grid, y, 4, 9, YLW)
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hline(grid, y, 5, 8, WHT)
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else:
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hline(grid, y, 5, 9, ORG)
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hline(grid, y, 6, 8, YLW)
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pixel(grid, 4, cy - 2, ORD)
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pixel(grid, 4, cy + 2, ORD)
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elif intensity >= 1:
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# Dim glow
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for dy in range(-1, 2):
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y = cy + dy
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if dy == 0:
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hline(grid, y, 7, 9, ORD)
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pixel(grid, 8, y, ORG)
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else:
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pixel(grid, 8, y, ORD)
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pixel(grid, 9, y, ORD)
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def apply_tilt(grid, tilt_pixels):
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"""Shift the left side of the image down by tilt_pixels to simulate
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nose-up tilt. This is a crude per-column vertical shift."""
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if tilt_pixels == 0:
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return grid
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new_grid = make_frame()
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for x in range(W):
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# Linear interpolation: left edge shifts down by tilt_pixels,
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# right edge stays the same
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shift = int(tilt_pixels * (1.0 - x / W))
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for y in range(H):
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src_y = y - shift
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if 0 <= src_y < H:
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new_grid[y][x] = grid[src_y][x]
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return new_grid
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def make_landed():
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"""Frame: ship landed on ground, gear down, no thrust."""
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grid = make_frame()
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draw_ship_body(grid, oy=0)
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draw_landing_gear(grid, oy=0, length=5)
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return grid
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def make_landing1():
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"""Frame 1: ship high, tilted nose-up, bright thrusters."""
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grid = make_frame()
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draw_ship_body(grid, oy=-8)
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draw_thrusters(grid, oy=-8, intensity=3)
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grid = apply_tilt(grid, 3)
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return grid
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def make_landing2():
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"""Frame 2: ship lower, less tilt, medium thrusters."""
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grid = make_frame()
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draw_ship_body(grid, oy=-4)
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draw_thrusters(grid, oy=-4, intensity=2)
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grid = apply_tilt(grid, 1)
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return grid
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def make_landing3():
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"""Frame 3: ship nearly level, near ground, gear extending, dim thrusters."""
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grid = make_frame()
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draw_ship_body(grid, oy=-2)
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draw_landing_gear(grid, oy=-2, length=3)
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draw_thrusters(grid, oy=-2, intensity=1)
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return grid
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def make_landing4():
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"""Frame 4: ship touching down, gear extended, no thrust."""
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grid = make_frame()
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draw_ship_body(grid, oy=0)
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draw_landing_gear(grid, oy=0, length=5)
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# Nearly identical to landed — maybe a very slight glow
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pixel(grid, 9, 23, ORD) # residual engine heat
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return grid
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def grid_to_image(grid):
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"""Convert a pixel grid to a PIL Image."""
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img = Image.new("RGBA", (W, H), (0, 0, 0, 0))
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for y in range(H):
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for x in range(W):
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img.putpixel((x, y), grid[y][x])
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return img
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def main():
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frames = [
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make_landed(),
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make_landing1(),
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make_landing2(),
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make_landing3(),
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make_landing4(),
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]
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# Combine into horizontal spritesheet
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sheet = Image.new("RGBA", (W * len(frames), H), (0, 0, 0, 0))
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for i, frame in enumerate(frames):
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img = grid_to_image(frame)
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sheet.paste(img, (i * W, 0))
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out_path = "assets/sprites/spacecraft.png"
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sheet.save(out_path)
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print(f"Saved spritesheet: {out_path} ({sheet.width}x{sheet.height})")
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if __name__ == "__main__":
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main()
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