mirror of https://github.com/nmlgc/ReC98.git
45 lines
1.2 KiB
C++
45 lines
1.2 KiB
C++
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/// Spark sprites
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/// -------------
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enum spark_render_as_t {
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SRA_DOT = 0, // 1×1-pixel dot
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SRA_SPRITE = 14, // Hardcoded 8×8-pixel spark sprite
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};
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struct spark_t {
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entity_flag_t flag;
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uint8_t age;
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// Stores the current and previous position, indexed with the currently
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// rendered VRAM page.
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SPPoint screen_topleft[2];
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SPPoint velocity;
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spark_render_as_t render_as;
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int8_t unused_1;
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// Defaults, initialized at the beginning of each stage
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// ----------------------------------------------------
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unsigned char angle;
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SubpixelLength8 speed_base;
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int8_t unused_2;
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spark_render_as_t default_render_as;
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// ----------------------------------------------------
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};
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static const int SPARK_COUNT = 64;
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extern spark_t sparks[SPARK_COUNT];
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// Index of the next spark_t instance within [sparks] to be set when adding a
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// new spark, regardless of its [flag].
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extern unsigned int spark_ring_i;
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// Number of spark_t instances within [sparks] between two successive
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// SRA_SPRITE instances. All others get initialized to SRA_DOT.
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extern uint8_t spark_sprite_interval;
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// Sparks are transitioned to F_REMOVE after their [age] reaches this value.
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extern uint8_t spark_age_max;
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