wip
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@ -907,6 +907,7 @@ impl Segment {
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}
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fn min_x(&self) -> f32 { f32::min(self.from.x, self.to.x) }
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fn max_x(&self) -> f32 { f32::max(self.from.x, self.to.x) }
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fn winding(&self) -> i32 {
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match self.from.x.partial_cmp(&self.to.x) {
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@ -1053,7 +1054,7 @@ impl<'o, 'p> Tiler<'o, 'p> {
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if !above_view_box {
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// NB: This order must not be changed!
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self.flush_fills();
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self.flush_tiles(tile_index_y);
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self.flush_tiles();
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}
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}
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@ -1066,35 +1067,46 @@ impl<'o, 'p> Tiler<'o, 'p> {
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let mut winding = 0;
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mem::swap(&mut self.old_active_edges, &mut self.active_edges.array);
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for mut active_edge in self.old_active_edges.drain(..) {
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let (segment_x, edge_winding) =
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if active_edge.segment.from.y < active_edge.segment.to.y {
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(active_edge.segment.from.x, 1)
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} else {
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(active_edge.segment.to.x, -1)
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};
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// Move over to the correct tile, filling in as we go.
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let mut tile_left = strip_bounds.origin.x + (tile_index_x as f32) * TILE_WIDTH;
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while tile_index_x < self.strip_tiles.len() {
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let tile_right = tile_left + TILE_WIDTH;
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let segment_left = active_edge.segment.min_x();
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if tile_left > segment_left {
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/*println!("filling tile_left={}, segment_x={} winding={}?",
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tile_left,
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segment_x,
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winding);*/
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if tile_right > segment_x {
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break
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}
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//println!("... filling!");
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self.strip_tiles[tile_index_x].backdrop = winding as f32;
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current_left = tile_right;
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tile_left = tile_right;
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tile_index_x += 1;
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}
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// Do subtile fill.
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let min_x = active_edge.segment.min_x();
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let edge_winding = active_edge.segment.winding();
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if current_left < min_x && tile_index_x < self.strip_tiles.len() {
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let left = Point2D::new(current_left - tile_left, 0.0);
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let right = Point2D::new(current_left - min_x, 0.0);
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// Do subtile fills.
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if current_left < segment_x && tile_index_x < self.strip_tiles.len() {
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let subtile_left = Point2D::new(current_left - tile_left, 0.0);
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let subtile_right = Point2D::new(segment_x - tile_left, 0.0);
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self.strip_fills.push(FillPrimitive {
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from: if edge_winding < 0 { left } else { right },
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to: if edge_winding < 0 { right } else { left },
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from: if edge_winding < 0 { subtile_left } else { subtile_right },
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to: if edge_winding < 0 { subtile_right } else { subtile_left },
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tile_index: tile_index_x as u32,
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});
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self.used_strip_tiles.insert(tile_index_x);
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current_left = right.x;
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current_left = segment_x;
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}
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// Update winding.
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@ -1164,15 +1176,17 @@ impl<'o, 'p> Tiler<'o, 'p> {
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}
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#[inline(never)]
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fn flush_tiles(&mut self, tile_index_y: i16) {
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fn flush_tiles(&mut self) {
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// Flush tiles.
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for (tile_index_x, tile) in self.strip_tiles.iter().enumerate() {
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if self.used_strip_tiles.contains(tile_index_x) {
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self.built_scene.mask_tiles.push(*tile);
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} else if tile.backdrop != 0.0 {
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let primitive =
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SolidTilePrimitive::new(tile_index_x as i16, tile_index_y, tile.color);
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self.built_scene.solid_tiles.push(primitive);
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self.built_scene.solid_tiles.push(SolidTilePrimitive {
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tile_x: tile.tile_x,
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tile_y: tile.tile_y,
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color: tile.color,
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});
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}
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}
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}
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@ -1800,9 +1814,17 @@ impl ActiveEdge {
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impl PartialOrd<ActiveEdge> for ActiveEdge {
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fn partial_cmp(&self, other: &ActiveEdge) -> Option<Ordering> {
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// NB: Reversed!
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let this_left = f32::min(self.segment.from.x, self.segment.to.x);
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let other_left = f32::min(other.segment.from.x, other.segment.to.x);
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other_left.partial_cmp(&this_left)
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let this_x = if self.segment.from.y < self.segment.to.y {
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self.segment.from.x
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} else {
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self.segment.to.x
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};
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let other_x = if other.segment.from.y < other.segment.to.y {
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other.segment.from.x
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} else {
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other.segment.to.x
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};
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this_x.partial_cmp(&other_x)
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}
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}
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