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https://github.com/imjasonh/nescript
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README: project overview, quick start, feature list, example table LICENSE: MIT 4 new examples covering all language features: - arrays_and_functions: arrays, while loops, inline/regular functions - state_machine: multi-state flow with on enter/exit handlers - sprites_and_palettes: inline CHR data, palette switching, scroll, cast - mmc1_banked: MMC1 mapper, bank declarations, software multiply Parser fix: draw statement keyword-arg parsing now checks for ':' lookahead before consuming an identifier, preventing it from eating the next statement as a keyword argument (e.g., `i += 1` after a draw). https://claude.ai/code/session_01W6eQFStA66EuMKHUFo2rx3
69 lines
1.5 KiB
Text
69 lines
1.5 KiB
Text
// Sprites and Palettes — demonstrates M3 asset features.
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//
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// Shows: sprite declarations with inline CHR data,
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// palette declarations, set_palette, type casting, scroll.
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//
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// Build: cargo run -- build examples/sprites_and_palettes.ne
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game "Asset Demo" {
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mapper: NROM
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}
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// Define a sprite with inline CHR tile data (16 bytes = one 8x8 tile)
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// This is a simple arrow pointing right
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sprite Arrow {
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chr: [0x18, 0x1C, 0xFE, 0xFF, 0xFF, 0xFE, 0x1C, 0x18,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]
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}
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// Define a sprite with a heart shape
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sprite Heart {
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chr: [0x66, 0xFF, 0xFF, 0xFF, 0x7E, 0x3C, 0x18, 0x00,
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0x66, 0xFF, 0xFF, 0xFF, 0x7E, 0x3C, 0x18, 0x00]
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}
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// Custom color palette
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palette Warm {
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colors: [0x0F, 0x06, 0x16, 0x26]
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}
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palette Cool {
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colors: [0x0F, 0x01, 0x11, 0x21]
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}
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var px: u8 = 128
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var py: u8 = 120
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var scroll_x: u8 = 0
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var use_warm: u8 = 1
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on frame {
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// Movement
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if button.right { px += 2 }
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if button.left { px -= 2 }
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if button.down { py += 2 }
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if button.up { py -= 2 }
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// Scroll background
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scroll_x += 1
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scroll(scroll_x, 0)
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// Toggle palette with A button
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if button.a {
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if use_warm == 1 {
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set_palette Cool
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use_warm = 0
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} else {
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set_palette Warm
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use_warm = 1
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}
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}
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// Type cast demo
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var wide: u16 = px as u16
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// Draw sprites
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draw Arrow at: (px, py)
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draw Heart at: (px, py - 16)
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}
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start Main
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