mirror of https://github.com/nmlgc/ReC98.git
34 lines
1.3 KiB
C++
34 lines
1.3 KiB
C++
#include "th02/main/playfld.hpp"
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#if defined(SUBPIXEL_HPP) && defined(MOTION_HPP)
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struct PlayfieldMotion : public MotionBase<PlayfieldPoint> {
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// Moves by one step, and returns the new current position.
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// The _seg1() and _seg3() variants are provided for near calls within
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// code segment #1 (rendering) and code segment #3 (update),
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// respectively.
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// Note that some calls to these functions directly access the returned
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// value through the AX (X) and DX (Y) registers.
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PlayfieldPoint pascal near update_seg1();
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PlayfieldPoint pascal near update_seg3();
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};
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#endif
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/// Shaking
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/// -------
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// Shake amount for the current frame; resets to 0 after calling
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// playfield_shake_update_and_render(). Can also be manually controlled while
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// [playfield_shake_anim_time] is 0.
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extern pixel_t playfield_shake_x;
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extern pixel_t playfield_shake_y;
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// Frames left in the 4-direction shake animation.
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extern int playfield_shake_anim_time;
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// Shifts the playfield on the current VRAM page by [playfield_shake], or runs
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// the 4-direction shake animation if it's active. After the playfield was
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// shifted, all tiles are invalidated for the next two frames, forcing a
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// redraw of the unshifted playfield on both VRAM pages.
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void near playfield_shake_update_and_render(void);
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/// -------
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