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add ColorTexture::CubeMap implementation #575

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add ColorTexture::CubeMap implementation #575

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c04fc4d
add ColorTexture::CubeMap implementation
danini-the-panini Aug 22, 2026
1890991
fix dpi of debug outputs, rearrange, add brdf
danini-the-panini Aug 23, 2026
643a939
add checkbox to show environment map debug
danini-the-panini Aug 23, 2026
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75 changes: 75 additions & 0 deletions examples/environment/src/main.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -72,6 +72,7 @@ pub async fn run() {

// main loop
let mut color = [1.0; 4];
let mut show_debug = false;
window.render_loop(move |mut frame_input| {
let mut panel_width = 0.0;
gui.update(
Expand All @@ -83,6 +84,7 @@ pub async fn run() {
use three_d::egui::*;
Panel::left("side_panel").show_inside(ui, |ui| {
ui.heading("Debug Panel");
ui.checkbox(&mut show_debug, "Show debug");

ui.label("Material");
ui.add(Slider::new(&mut model.material.metallic, 0.0..=1.0).text("Metallic"));
Expand Down Expand Up @@ -186,6 +188,79 @@ pub async fn run() {
.write(|| gui.render())
.unwrap();

if show_debug {
let secondary_viewport = Viewport {
x: viewport.x,
y: viewport.y,
width: (200.0 * frame_input.device_pixel_ratio) as u32,
height: (100.0 * frame_input.device_pixel_ratio) as u32,
};
camera.set_viewport(secondary_viewport);
frame_input.screen().apply_screen_effect(
&CopyEffect::default(),
&camera,
&[],
Some(ColorTexture::CubeMap {
texture: skybox.texture(),
sides: &[],
}),
None,
);

let secondary_viewport = Viewport {
x: viewport.x,
y: viewport.y + (100.0 * frame_input.device_pixel_ratio) as i32,
width: (200.0 * frame_input.device_pixel_ratio) as u32,
height: (100.0 * frame_input.device_pixel_ratio) as u32,
};
camera.set_viewport(secondary_viewport);
frame_input.screen().apply_screen_effect(
&CopyEffect::default(),
&camera,
&[],
Some(ColorTexture::CubeMap {
texture: &light.environment.as_ref().unwrap().prefilter_map,
sides: &[],
}),
None,
);

let secondary_viewport = Viewport {
x: viewport.x,
y: viewport.y + (200.0 * frame_input.device_pixel_ratio) as i32,
width: (200.0 * frame_input.device_pixel_ratio) as u32,
height: (100.0 * frame_input.device_pixel_ratio) as u32,
};
camera.set_viewport(secondary_viewport);
frame_input.screen().apply_screen_effect(
&CopyEffect::default(),
&camera,
&[],
Some(ColorTexture::CubeMap {
texture: &light.environment.as_ref().unwrap().irradiance_map,
sides: &[],
}),
None,
);

let secondary_viewport = Viewport {
x: viewport.x,
y: viewport.y + (300.0 * frame_input.device_pixel_ratio) as i32,
width: (200.0 * frame_input.device_pixel_ratio) as u32,
height: (200.0 * frame_input.device_pixel_ratio) as u32,
};
camera.set_viewport(secondary_viewport);
frame_input.screen().apply_screen_effect(
&CopyEffect::default(),
&camera,
&[],
Some(ColorTexture::Single(
&light.environment.as_ref().unwrap().brdf_map,
)),
None,
);
}

FrameOutput::default()
});
}
22 changes: 17 additions & 5 deletions src/core/texture.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -137,7 +137,21 @@ impl ColorTexture<'_> {
return texture(colorMap, vec3(uv, colorLayers[index]));
}"
.to_owned(),
Self::CubeMap { .. } => todo!(),
// Equirectangular projection
// SOURCE: https://stackoverflow.com/a/57544913
Self::CubeMap { .. } => "
#define PI 3.1415926
uniform samplerCube cubeMap;
vec4 sample_color(vec2 uv) {
float phi=uv.s*PI*2;
float theta=(uv.t-0.5)*PI;

vec3 dir = vec3(cos(phi)*cos(theta),sin(theta),sin(phi)*cos(theta));

return texture(cubeMap, dir);
}
"
.to_owned(),
}
}

Expand All @@ -148,9 +162,7 @@ impl ColorTexture<'_> {
match self {
Self::Single { .. } => 1u16 << 3,
Self::Array { .. } => 10u16 << 3,
Self::CubeMap { .. } => {
todo!()
}
Self::CubeMap { .. } => 100u16 << 3,
}
}

Expand All @@ -169,7 +181,7 @@ impl ColorTexture<'_> {
program.use_uniform_array("colorLayers", &la);
program.use_texture_array("colorMap", texture);
}
Self::CubeMap { .. } => todo!(),
Self::CubeMap { texture, .. } => program.use_texture_cube("cubeMap", texture),
}
}
}
Expand Down