From b8d4a815453acac752c6fb3c56d047e39a76fd05 Mon Sep 17 00:00:00 2001 From: skal Date: Sat, 14 Feb 2026 19:05:34 +0100 Subject: feat(gpu): add SDF camera infrastructure and effect base class Add unified camera system for SDF raymarching effects: - CameraParams struct (80 bytes): inv_view matrix + FOV/near/far/aspect - SDFEffect base class: manages camera uniform, provides update_camera() helpers - camera_common.wgsl: getCameraRay(), position/forward/up/right extractors - SDFTestEffect: working example with orbiting camera + animated sphere Refactor effect headers: - Extract class definitions from demo_effects.h to individual .h files - Update includes in .cc files to use specific headers - Cleaner compilation dependencies, faster incremental builds Documentation: - Add SDF_EFFECT_GUIDE.md with complete workflow - Update ARCHITECTURE.md, UNIFORM_BUFFER_GUIDELINES.md - Update EFFECT_WORKFLOW.md, CONTRIBUTING.md Tests: 34/34 passing, SDFTestEffect validated Co-Authored-By: Claude Sonnet 4.5 --- src/gpu/camera_params.h | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) create mode 100644 src/gpu/camera_params.h (limited to 'src/gpu/camera_params.h') diff --git a/src/gpu/camera_params.h b/src/gpu/camera_params.h new file mode 100644 index 0000000..361f65f --- /dev/null +++ b/src/gpu/camera_params.h @@ -0,0 +1,18 @@ +// This file is part of the 64k demo project. +// It defines CameraParams for raymarching effects. + +#pragma once + +#include "util/mini_math.h" + +// Camera parameters for SDF raymarching effects +// Binding convention: @group(0) @binding(3) +struct CameraParams { + mat4 inv_view; // Inverse view matrix (screen→world transform) + float fov; // Vertical field of view in radians + float near_plane; // Near clipping plane + float far_plane; // Far clipping plane + float aspect_ratio; // Width/height ratio +}; +static_assert(sizeof(CameraParams) == 80, + "CameraParams must be 80 bytes for WGSL alignment"); -- cgit v1.2.3