mirror of https://github.com/nmlgc/ReC98.git
89 lines
2.7 KiB
C++
89 lines
2.7 KiB
C++
// Generic overlap testing macros for collision detection
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// ------------------------------------------------------
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#define overlap_low_center_lt_gt(low_edge_1, extent_1, center_2, extent_2) ( \
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(low_edge_1) > ((center_2) - (extent_2 / 2)) && \
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(low_edge_1) < ((center_2) + (extent_2 / 2) - (extent_1)) \
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)
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#define overlap_xywh_xywh_lt_gt(x1, y1, w1, h1, x2, y2, w2, h2) ( \
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(((x1) - (x2)) < (w2)) && \
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(((x1) - (x2)) > -(w1)) && \
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(((y1) - (y2)) < (h2)) && \
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(((y1) - (y2)) > -(h1)) \
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)
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#define overlap_xywh_xywh_le_ge(x1, y1, w1, h1, x2, y2, w2, h2) ( \
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(((x1) - (x2)) <= (w2)) && \
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(((x1) - (x2)) >= -(w1)) && \
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(((y1) - (y2)) <= (h2)) && \
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(((y1) - (y2)) >= -(h1)) \
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)
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#define overlap_xy_ltrb_lt_gt(x1, y1, left2, top2, right2, bottom2) ( \
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((x1) > (left2)) && \
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((x1) < (right2)) && \
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((y1) > (top2)) && \
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((y1) < (bottom2)) \
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)
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#define overlap_xy_lrtb_le_ge(x1, y1, left2, top2, right2, bottom2) ( \
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((x1) >= (left2)) && \
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((x1) <= (right2)) && \
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((y1) >= (top2)) && \
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((y1) <= (bottom2)) \
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)
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#define overlap_xyxy_lrtb_le_ge(x1, y1, left2, top2, right2, bottom2) ( \
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((x1) >= (left2)) && \
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((y1) <= (bottom2)) && \
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((x1) <= (right2)) && \
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((y1) >= (top2)) \
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)
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#define overlap_xy_lrbt_le_ge(x1, y1, left2, top2, right2, bottom2) ( \
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((x1) >= (left2)) && \
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((x1) <= (right2)) && \
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((y1) <= (bottom2)) && \
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((y1) >= (top2)) \
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)
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#define overlap_xy_rltb_lt_ge(x1, y1, left2, top2, right2, bottom2) ( \
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((x1) < (right2)) && \
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((x1) >= (left2)) && \
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((y1) >= (top2)) && \
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((y1) < (bottom2)) \
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)
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#define overlap_xy_xywh_le_ge(x1, y1, x2, y2, w2, h2) \
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overlap_xy_lrtb_le_ge(x1, y1, x2, y2, (x2 + w2), (y2 + h2))
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#define overlap_xy_xywh_le_ge_2(x1, y1, x2, y2, w2, h2) \
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overlap_xy_lrbt_le_ge(x1, y1, x2, y2, (x2 + w2), (y2 + h2))
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// Ugly, and should not exist, but generates one fewer instruction when used
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// with _AX and _DX register pseudovariables...
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#define overlap_offcenter_1d_inplace_fast(delta, dist_edge1, dist_edge2) ( \
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(unsigned int)((delta) += dist_edge1, delta) <= (dist_edge1 + dist_edge2) \
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)
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#define overlap_offcenter_inplace_fast( \
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delta_x, delta_y, dist_to_left, dist_to_top, dist_to_right, dist_to_bottom \
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) ( \
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overlap_offcenter_1d_inplace_fast(delta_x, dist_to_left, dist_to_right) && \
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overlap_offcenter_1d_inplace_fast(delta_y, dist_to_top, dist_to_bottom) \
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)
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#define overlap_1d_inplace_fast(delta, extent) ( \
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(unsigned int)((delta) += (extent / 2), delta) <= (extent) \
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)
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#define overlap_wh_inplace_fast(delta_x, delta_y, w, h) ( \
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overlap_1d_inplace_fast(delta_x, w) && overlap_1d_inplace_fast(delta_y, h) \
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)
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#define overlap_points_wh_fast(p1, p2, p1_w, p1_h) ( \
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((unsigned int)((p1.x - p2.x) + (p1_w / 2)) <= (p1_w)) && \
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((unsigned int)((p1.y - p2.y) + (p1_h / 2)) <= (p1_h)) \
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)
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