andrewlowndes / vector-analytical-coverage

Rendering vector graphics by calculating the analytical coverage using Green's Theorem

Analytical vector rendering

Just some experiments with computing the coverage of vectors by clipping vectors into closed-form shapes (lines, bezier quadratics and cubics) and calculating the coverage using Green's Theorem. No triangulation is performed.

Running examples

Ensure Rust is installed and run the examples via:

cargo run --release --example=render
cargo run --release --example=blur
cargo run --release --example=shape
cargo run --release --example=point_test

Rendering

The 'render' example demonstrates per-pixel projection onto the shape and clipping, producing an alpha amount. The algorithm is designed to be ran on a Fragment shader of a GPU (coming soon) and will hopefully be quick enough to support rendering dynamic vectors in 3D with subpixel quality.

Blur

High-quality blurs can be applied easily by changing the size of each projected pixel with little to no extra cost. The blurs use the same analytical coverage computation and are very high quality. The shape of each projected pixel can be changed to obtain different blur effects.