45 lines
1.0 KiB
Zig
45 lines
1.0 KiB
Zig
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const term = @import("term.zig");
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const Winsize = term.Winsize;
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const primitive = @import("primitives.zig");
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const Point = primitive.Point;
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pub fn mv_axis_border_bounce(w: Winsize, point: *Point, axis: u8) void {
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var cor = &point.x;
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var dir = &point.direction.x;
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var upper = w.ws_col;
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switch (axis) {
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'x' => {
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cor = &point.x;
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upper = w.ws_col;
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dir = &point.direction.x;
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},
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'y' => {
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cor = &point.y;
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upper = w.ws_row;
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dir = &point.direction.y;
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},
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'X' => {
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cor = &point.x;
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upper = w.ws_col;
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dir = &point.direction.x;
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dir.* = -1;
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},
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'Y' => {
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cor = &point.y;
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upper = w.ws_row;
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dir = &point.direction.y;
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dir.* = -1;
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},
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else => {},
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}
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if (cor.* < upper and cor.* > 0) {
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cor.* += dir.*;
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}
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if (cor.* >= upper or cor.* <= 0) {
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dir.* *= -1;
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cor.* += dir.*;
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}
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}
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