2020-09-26 18:51:56 +00:00
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// Inverts the 32×32 square at (⌊left/8⌋*8, top) on the given VRAM [plane].
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// Returns true if the square is not fully within the boundaries of VRAM and
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// was not inverted, false otherwise.
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bool16 graph_invert_32x32_8(screen_x_t left, vram_y_t top, dots8_t far *plane);
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2022-01-22 17:45:00 +00:00
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/// Expanding 4-stack, 32-square boss entrance rings
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/// ------------------------------------------------
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/// Final part of Kikuri's and Sariel's entrance animation. Renders the
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/// individual squares in order, and thus only requires a single control
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/// variable to indicate both the ring number and the angle within the ring.
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static const int ENTRANCE_RING_STACK = 4;
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static const int ENTRANCE_RING_SQUARES = 32;
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inline long entrance_ring_radius(pixel_t base, unsigned int square_i) {
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return (base * static_cast<long>(square_i / ENTRANCE_RING_SQUARES));
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}
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#define entrance_ring_invert(square_i, radius_base) \
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graph_invert_32x32_8( \
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polar_y( \
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static_cast<long>((RES_X / 2) - (32 / 2)), \
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entrance_ring_radius(radius_base, square_i), \
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(i * (0x100 / ENTRANCE_RING_SQUARES)) \
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), \
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polar_x(\
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static_cast<long>(((RES_Y / 2) - 4) - (32 / 2)), \
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entrance_ring_radius(radius_base, square_i), \
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(i * (0x100 / ENTRANCE_RING_SQUARES)) \
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), \
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VRAM_PLANE_R \
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); \
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// Stupid inconsistencies deserve stupid macro treatment...
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#define entrance_rings_invert(square_i, invert_lhs, radius_base) { \
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for( \
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square_i = (1 * ENTRANCE_RING_SQUARES); \
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square_i < ((1 + ENTRANCE_RING_STACK) * ENTRANCE_RING_SQUARES); \
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i++ \
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) { \
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invert_lhs entrance_ring_invert(square_i, radius_base); \
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} \
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}
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#define entrance_rings_done(squares_offscreen) \
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(squares_offscreen >= (ENTRANCE_RING_STACK * ENTRANCE_RING_SQUARES))
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/// ------------------------------------------------
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