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transforms.rs

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use processing_glfw::GlfwContext;

use bevy::math::{Vec2, Vec3};

use processing::prelude::*;

use processing_render::render::command::DrawCommand;

use std::f32::consts::PI;

fn main() {

sketch().unwrap();

exit(0).unwrap();

}

fn sketch() -> error::Result<()> {

let mut glfw_ctx = GlfwContext::new(400, 400, false)?;

init(Config::default())?;

let surface = glfw_ctx.create_surface(400, 400, false)?;

let graphics = graphics_create(surface, 400, 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(0.1, 0.1, 0.1)),

)?;

for i in 0..4 {

for j in 0..4 {

graphics_record_command(graphics, DrawCommand::PushMatrix)?;

graphics_record_command(

graphics,

DrawCommand::Translate(

Vec2::new(50.0 + j as f32 * 100.0, 50.0 + i as f32 * 100.0).extend(0.0),

)?;

let angle = t + (i + j) as f32 * PI / 8.0;

graphics_record_command(

graphics,

DrawCommand::Rotate {

angle,

axis: Vec3::Z,

)?;

let s = 0.8 + (t * 2.0 + (i * j) as f32).sin() * 0.2;

graphics_record_command(graphics, DrawCommand::Scale(Vec2::splat(s).extend(1.0)))?;

let r = j as f32 / 3.0;

let g = i as f32 / 3.0;

graphics_record_command(

graphics,

DrawCommand::Fill(bevy::color::Color::srgb(r, g, 0.8)),

)?;

graphics_record_command(

graphics,

DrawCommand::Rect {

x: -20.0,

y: -20.0,

w: 40.0,

h: 40.0,

radii: [0.0; 4],

)?;

graphics_record_command(graphics, DrawCommand::PopMatrix)?;

}

graphics_end_draw(graphics)?;

t += 0.02;

}

Ok(())

}