Struct epaint::tessellator::Tessellator

source ·

pub struct Tessellator {
    pixels_per_point: f32,
    options: TessellationOptions,
    font_tex_size: [usize; 2],
    prepared_discs: Vec<PreparedDisc>,
    feathering: f32,
    clip_rect: Rect,
    scratchpad_points: Vec<Pos2>,
    scratchpad_path: Path,
}

Expand description

Converts Shapes into triangles (Mesh).

For performance reasons it is smart to reuse the same Tessellator.

See also tessellate_shapes, a convenient wrapper around Tessellator.

Fields§

§pixels_per_point: f32§options: TessellationOptions§font_tex_size: [usize; 2]§prepared_discs: Vec<PreparedDisc>

See crate::TextureAtlas::prepared_discs.

§feathering: f32

size of feathering in points. normally the size of a physical pixel. 0.0 if disabled

§clip_rect: Rect

Only used for culling

§scratchpad_points: Vec<Pos2>§scratchpad_path: Path

Implementations§

source §

impl Tessellator

source

pub fn new( pixels_per_point: f32, options: TessellationOptions, font_tex_size: [usize; 2], prepared_discs: Vec<PreparedDisc>, ) -> Self

Create a new Tessellator.

pixels_per_point: number of physical pixels to each logical point
options: tessellation quality
shapes: what to tessellate
font_tex_size: size of the font texture. Required to normalize glyph uv rectangles when tessellating text.
prepared_discs: What crate::TextureAtlas::prepared_discs returns. Can safely be set to an empty vec.

source

pub fn set_clip_rect(&mut self, clip_rect: Rect)

Set the Rect to use for culling.

source

pub fn tessellate_clipped_shape( &mut self, clipped_shape: ClippedShape, out_primitives: &mut Vec<ClippedPrimitive>, )

Tessellate a clipped shape into a list of primitives.

source

pub fn tessellate_shape(&mut self, shape: Shape, out: &mut Mesh)

Tessellate a single Shape into a Mesh.

This call can panic the given shape is of Shape::Vec or Shape::Callback. For that, use Self::tessellate_clipped_shape instead.

shape: the shape to tessellate.
out: triangles are appended to this.

source

pub fn tessellate_circle(&mut self, shape: CircleShape, out: &mut Mesh)

Tessellate a single CircleShape into a Mesh.

shape: the circle to tessellate.
out: triangles are appended to this.

source

pub fn tessellate_ellipse(&mut self, shape: EllipseShape, out: &mut Mesh)

Tessellate a single EllipseShape into a Mesh.

shape: the ellipse to tessellate.
out: triangles are appended to this.

source

pub fn tessellate_mesh(&self, mesh: &Mesh, out: &mut Mesh)

Tessellate a single Mesh into a Mesh.

mesh: the mesh to tessellate.
out: triangles are appended to this.

source

pub fn tessellate_line( &mut self, points: [Pos2; 2], stroke: impl Into<PathStroke>, out: &mut Mesh, )

Tessellate a line segment between the two points with the given stroke into a Mesh.

shape: the mesh to tessellate.
out: triangles are appended to this.

source

pub fn tessellate_path(&mut self, path_shape: &PathShape, out: &mut Mesh)

Tessellate a single PathShape into a Mesh.

path_shape: the path to tessellate.
out: triangles are appended to this.

source

pub fn tessellate_rect(&mut self, rect: &RectShape, out: &mut Mesh)

Tessellate a single Rect into a Mesh.

rect: the rectangle to tessellate.
out: triangles are appended to this.

source

pub fn tessellate_text(&mut self, text_shape: &TextShape, out: &mut Mesh)

Tessellate a single TextShape into a Mesh.

text_shape: the text to tessellate.
out: triangles are appended to this.

source

pub fn tessellate_quadratic_bezier( &mut self, quadratic_shape: &QuadraticBezierShape, out: &mut Mesh, )

Tessellate a single QuadraticBezierShape into a Mesh.

quadratic_shape: the shape to tessellate.
out: triangles are appended to this.

source

pub fn tessellate_cubic_bezier( &mut self, cubic_shape: &CubicBezierShape, out: &mut Mesh, )

Tessellate a single CubicBezierShape into a Mesh.

cubic_shape: the shape to tessellate.
out: triangles are appended to this.

source

fn tessellate_bezier_complete( &mut self, points: &[Pos2], fill: Color32, closed: bool, stroke: &PathStroke, out: &mut Mesh, )

source §

impl Tessellator

source

pub fn tessellate_shapes( &mut self, shapes: Vec<ClippedShape>, ) -> Vec<ClippedPrimitive>

Turns Shape:s into sets of triangles.

The given shapes will tessellated in the same order as they are given. They will be batched together by clip rectangle.

pixels_per_point: number of physical pixels to each logical point
options: tessellation quality
shapes: what to tessellate
font_tex_size: size of the font texture. Required to normalize glyph uv rectangles when tessellating text.
prepared_discs: What crate::TextureAtlas::prepared_discs returns. Can safely be set to an empty vec.

The implementation uses a Tessellator.