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GeezerVison is showing github.com — libprocessing/examples/curves.rs at python-api · processing/libprocessing

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use processing_glfw::GlfwContext;
use processing::prelude::*;
use processing_render::render::command::DrawCommand;
fn main() {
sketch().unwrap();
exit(0).unwrap();
}
fn sketch() -> error::Result<()> {
let mut glfw_ctx = GlfwContext::new(800, 400, false)?;
init(Config::default())?;
let surface = glfw_ctx.create_surface(800, 400, false)?;
let graphics = graphics_create(surface, 800, 400, TextureFormat::Rgba16Float)?;
let mut t: f32 = 0.0;
while glfw_ctx.poll_events() {
graphics_begin_draw(graphics)?;
graphics_record_command(
graphics,
DrawCommand::BackgroundColor(bevy::color::Color::srgb(0.04, 0.04, 0.06)),
)?;
graphics_record_command(graphics, DrawCommand::NoFill)?;
graphics_record_command(graphics, DrawCommand::StrokeWeight(1.5))?;
for i in 0..20 {
let y_base = 20.0 + i as f32 * 15.0;
let phase = t + i as f32 * 0.3;
let amp = 30.0 + (i as f32 * 0.5).sin() * 20.0;
let v = 0.3 + (i as f32 / 20.0) * 0.5;
graphics_record_command(
graphics,
DrawCommand::StrokeColor(bevy::color::Color::srgb(v * 0.6, v, (v * 1.2).min(1.0))),
)?;
graphics_record_command(
graphics,
DrawCommand::Bezier {
x1: 0.0,
y1: y_base,
x2: 250.0,
y2: y_base + amp * phase.sin(),
x3: 550.0,
y3: y_base - amp * (phase * 1.3).cos(),
x4: 800.0,
y4: y_base,
},
)?;
}
graphics_record_command(graphics, DrawCommand::StrokeWeight(0.8))?;
for i in 0..8 {
let y_base = 50.0 + i as f32 * 40.0;
let phase = t * 0.7 + i as f32 * 0.5;
graphics_record_command(
graphics,
DrawCommand::StrokeColor(bevy::color::Color::srgba(1.0, 0.6, 0.2, 0.4)),
)?;
graphics_record_command(
graphics,
DrawCommand::Curve {
x1: -50.0,
y1: y_base + 40.0 * phase.sin(),
x2: 200.0,
y2: y_base + 30.0 * (phase * 1.2).cos(),
x3: 600.0,
y3: y_base - 30.0 * (phase * 0.8).sin(),
x4: 850.0,
y4: y_base + 20.0 * phase.cos(),
},
)?;
}
graphics_record_command(graphics, DrawCommand::StrokeWeight(0.3))?;
graphics_record_command(
graphics,
DrawCommand::StrokeColor(bevy::color::Color::srgba(1.0, 1.0, 1.0, 0.08)),
)?;
for i in 0..20 {
let y = 20.0 * i as f32;
graphics_record_command(
graphics,
DrawCommand::Line {
x1: 0.0,
y1: y,
x2: 800.0,
y2: y,
},
)?;
}
graphics_end_draw(graphics)?;
t += 0.012;
}
Ok(())
}
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