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fix displacements for non square surfaces

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This commit is contained in:
Robin Appelman 2022-02-20 23:03:54 +01:00
commit 8e2d634e12
1 changed files with 12 additions and 6 deletions
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18
src/handle.rs
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@ -232,18 +232,24 @@ impl<'a> Handle<'a, DisplacementInfo> {
corner_positions.rotate_left(start_index);
let start_corner = corner_positions[0];
let step_scale = 1.0 / (steps as f32 - 1.0);
let x_dir = (corner_positions[3] - corner_positions[0]) * step_scale;
let y_dir = (corner_positions[1] - corner_positions[0]) * step_scale;
let edge_intervals = [
(corner_positions[1] - corner_positions[0]) * step_scale,
(corner_positions[2] - corner_positions[3]) * step_scale,
];
Some(
self.displacement_vertices()
.enumerate()
.map(move |(i, displacement)| {
let x = (i % steps) as f32;
let y = (i / steps) as f32;
let base_pos = start_corner + (x_dir * x) + (y_dir * y);
let y = (i % steps) as f32;
let x = (i / steps) as f32;
let edge_positions = [
corner_positions[0] + edge_intervals[0] * x,
corner_positions[3] + edge_intervals[1] * x,
];
let segment_interval = (edge_positions[1] - edge_positions[0]) * step_scale;
let base_pos = edge_positions[0] + (segment_interval * y);
base_pos + displacement.displacement()
}),
)