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Render to texture example: No need to create an image handle manually. (#4223)

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# Objective

- Make the example a little easier to follow by removing unnecessary steps.

## Solution

- `Assets<Image>` will give us a handle for our render texture if we call `add()` instead of `set()`.  No need to set it manually; one less thing to think about while reading the example.
This commit is contained in:
Chris Foster 2022-03-16 01:53:04 +00:00
parent 6ff17eaab8
commit 21f6760b2a
1 changed files with 3 additions and 8 deletions
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11
examples/3d/render_to_texture.rs
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@ -3,7 +3,6 @@ use bevy::{
draw_3d_graph, node, AlphaMask3d, Opaque3d, RenderTargetClearColors, Transparent3d, draw_3d_graph, node, AlphaMask3d, Opaque3d, RenderTargetClearColors, Transparent3d,
}, },
prelude::*, prelude::*,
reflect::TypeUuid,
render::{ render::{
camera::{ActiveCamera, Camera, CameraTypePlugin, RenderTarget}, camera::{ActiveCamera, Camera, CameraTypePlugin, RenderTarget},
render_graph::{Node, NodeRunError, RenderGraph, RenderGraphContext, SlotValue}, render_graph::{Node, NodeRunError, RenderGraph, RenderGraphContext, SlotValue},
@ -20,10 +19,6 @@ use bevy::{
#[derive(Component, Default)] #[derive(Component, Default)]
pub struct FirstPassCamera; pub struct FirstPassCamera;
// This handle will point at the texture to which we will render in the first pass.
pub const RENDER_IMAGE_HANDLE: HandleUntyped =
HandleUntyped::weak_from_u64(Image::TYPE_UUID, 13378939762009864029);
// The name of the final node of the first pass. // The name of the final node of the first pass.
pub const FIRST_PASS_DRIVER: &str = "first_pass_driver"; pub const FIRST_PASS_DRIVER: &str = "first_pass_driver";
@ -145,7 +140,7 @@ fn setup(
// fill image.data with zeroes // fill image.data with zeroes
image.resize(size); image.resize(size);
let image_handle = images.set(RENDER_IMAGE_HANDLE, image); let image_handle = images.add(image);
let cube_handle = meshes.add(Mesh::from(shape::Cube { size: 4.0 })); let cube_handle = meshes.add(Mesh::from(shape::Cube { size: 4.0 }));
let cube_material_handle = materials.add(StandardMaterial { let cube_material_handle = materials.add(StandardMaterial {
@ -177,7 +172,7 @@ fn setup(
}); });
// First pass camera // First pass camera
let render_target = RenderTarget::Image(image_handle); let render_target = RenderTarget::Image(image_handle.clone());
clear_colors.insert(render_target.clone(), Color::WHITE); clear_colors.insert(render_target.clone(), Color::WHITE);
commands commands
.spawn_bundle(PerspectiveCameraBundle::<FirstPassCamera> { .spawn_bundle(PerspectiveCameraBundle::<FirstPassCamera> {
@ -209,7 +204,7 @@ fn setup(
// This material has the texture that has been rendered. // This material has the texture that has been rendered.
let material_handle = materials.add(StandardMaterial { let material_handle = materials.add(StandardMaterial {
base_color_texture: Some(RENDER_IMAGE_HANDLE.typed()), base_color_texture: Some(image_handle),
reflectance: 0.02, reflectance: 0.02,
unlit: false, unlit: false,
..default() ..default()