mirror of
https://github.com/johndoe6345789/SDL3CPlusPlus.git
synced 2026-04-25 14:15:02 +00:00
johndoe6345789
df19ae9264
- Updated JsonConfigWriterService to structure the JSON output with new sections for scripts, window settings, input bindings, paths, rendering, and GUI configurations. - Introduced a new method in ICrashRecoveryService to record frame heartbeats, allowing for better tracking of long-running operations. - Refactored existing code to improve readability and maintainability, including the addition of helper functions for adding string members to JSON objects.
363 lines
13 KiB
Lua
363 lines
13 KiB
Lua
-- Scene Framework: Reusable components for 3D scene construction
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-- Provides mesh generation, object builders, and utility functions
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local math3d = require("math3d")
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local config_resolver = require("config_resolver")
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local framework = {}
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-- ============================================================================
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-- Config Resolution Utilities
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-- ============================================================================
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function framework.resolve_number(value, fallback)
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if type(value) == "number" then
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return value
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end
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return fallback
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end
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function framework.resolve_boolean(value, fallback)
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if type(value) == "boolean" then
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return value
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end
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return fallback
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end
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function framework.resolve_string(value, fallback)
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if type(value) == "string" then
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return value
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end
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return fallback
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end
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function framework.resolve_table(value, fallback)
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if type(value) == "table" then
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return value
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end
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return fallback or {}
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end
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function framework.resolve_vec3(value, fallback)
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if type(value) == "table"
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and type(value[1]) == "number"
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and type(value[2]) == "number"
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and type(value[3]) == "number" then
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return {value[1], value[2], value[3]}
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end
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return {fallback[1], fallback[2], fallback[3]}
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end
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-- ============================================================================
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-- Mesh Generation
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-- ============================================================================
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--- Generate a tessellated plane mesh with normals pointing up (+Y)
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--- @param width number Width along X axis
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--- @param depth number Depth along Z axis
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--- @param subdivisions number Number of divisions per axis (e.g., 20 = 400 quads = 441 vertices)
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--- @param color table RGB color {r, g, b} with values 0-1, defaults to white
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--- @return table vertices Array of vertex tables with position, normal, color, texcoord
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--- @return table indices Array of uint16 triangle indices
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function framework.generate_plane_mesh(width, depth, subdivisions, color)
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color = color or {1.0, 1.0, 1.0}
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subdivisions = subdivisions or 1
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local vertices = {}
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local indices = {}
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local half_width = width / 2
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local half_depth = depth / 2
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local step_x = width / subdivisions
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local step_z = depth / subdivisions
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-- Generate vertices
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for z = 0, subdivisions do
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for x = 0, subdivisions do
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local px = -half_width + x * step_x
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local pz = -half_depth + z * step_z
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local u = x / subdivisions
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local v = z / subdivisions
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table.insert(vertices, {
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position = {px, 0.0, pz},
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normal = {0.0, 1.0, 0.0},
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color = color,
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texcoord = {u, v}
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})
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end
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end
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-- Generate indices (two triangles per quad)
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for z = 0, subdivisions - 1 do
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for x = 0, subdivisions - 1 do
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local base = z * (subdivisions + 1) + x
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local v0 = base
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local v1 = base + 1
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local v2 = base + subdivisions + 1
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local v3 = base + subdivisions + 2
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-- First triangle
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table.insert(indices, v0)
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table.insert(indices, v2)
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table.insert(indices, v1)
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-- Second triangle
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table.insert(indices, v1)
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table.insert(indices, v2)
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table.insert(indices, v3)
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end
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end
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return vertices, indices
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end
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--- Apply a color to a copy of vertices array
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--- @param vertices table Source vertices array
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--- @param color table RGB color {r, g, b} with values 0-1
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--- @return table New vertices array with color applied
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function framework.apply_color_to_vertices(vertices, color)
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local colored = {}
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for i = 1, #vertices do
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local v = vertices[i]
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colored[i] = {
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position = v.position,
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normal = v.normal,
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color = color,
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texcoord = v.texcoord
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}
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end
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return colored
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end
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--- Flip normals for a vertices array (useful for ceilings, inside-out geometry)
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--- @param vertices table Vertices array to modify in-place
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function framework.flip_normals(vertices)
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for i = 1, #vertices do
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local n = vertices[i].normal
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vertices[i].normal = {-n[1], -n[2], -n[3]}
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end
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end
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--- Generate a cube mesh (unit cube from -0.5 to 0.5)
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--- @param double_sided boolean If true, generates back faces for inside-out rendering
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--- @return table vertices Array of 24 vertices (4 per face)
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--- @return table indices Array of triangle indices (36 for single-sided, 72 for double-sided)
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function framework.generate_cube_mesh(double_sided)
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-- Standard unit cube vertices (8 unique positions, but 24 vertices for proper normals per face)
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local vertices = {
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-- Front face (+Z)
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{position = {-0.5, -0.5, 0.5}, normal = { 0.0, 0.0, 1.0}, color = {1, 1, 1}, texcoord = {0, 0}},
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{position = { 0.5, -0.5, 0.5}, normal = { 0.0, 0.0, 1.0}, color = {1, 1, 1}, texcoord = {1, 0}},
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{position = { 0.5, 0.5, 0.5}, normal = { 0.0, 0.0, 1.0}, color = {1, 1, 1}, texcoord = {1, 1}},
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{position = {-0.5, 0.5, 0.5}, normal = { 0.0, 0.0, 1.0}, color = {1, 1, 1}, texcoord = {0, 1}},
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-- Back face (-Z)
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{position = { 0.5, -0.5, -0.5}, normal = { 0.0, 0.0, -1.0}, color = {1, 1, 1}, texcoord = {0, 0}},
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{position = {-0.5, -0.5, -0.5}, normal = { 0.0, 0.0, -1.0}, color = {1, 1, 1}, texcoord = {1, 0}},
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{position = {-0.5, 0.5, -0.5}, normal = { 0.0, 0.0, -1.0}, color = {1, 1, 1}, texcoord = {1, 1}},
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{position = { 0.5, 0.5, -0.5}, normal = { 0.0, 0.0, -1.0}, color = {1, 1, 1}, texcoord = {0, 1}},
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-- Top face (+Y)
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{position = {-0.5, 0.5, 0.5}, normal = { 0.0, 1.0, 0.0}, color = {1, 1, 1}, texcoord = {0, 0}},
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{position = { 0.5, 0.5, 0.5}, normal = { 0.0, 1.0, 0.0}, color = {1, 1, 1}, texcoord = {1, 0}},
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{position = { 0.5, 0.5, -0.5}, normal = { 0.0, 1.0, 0.0}, color = {1, 1, 1}, texcoord = {1, 1}},
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{position = {-0.5, 0.5, -0.5}, normal = { 0.0, 1.0, 0.0}, color = {1, 1, 1}, texcoord = {0, 1}},
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-- Bottom face (-Y)
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{position = {-0.5, -0.5, -0.5}, normal = { 0.0, -1.0, 0.0}, color = {1, 1, 1}, texcoord = {0, 0}},
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{position = { 0.5, -0.5, -0.5}, normal = { 0.0, -1.0, 0.0}, color = {1, 1, 1}, texcoord = {1, 0}},
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{position = { 0.5, -0.5, 0.5}, normal = { 0.0, -1.0, 0.0}, color = {1, 1, 1}, texcoord = {1, 1}},
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{position = {-0.5, -0.5, 0.5}, normal = { 0.0, -1.0, 0.0}, color = {1, 1, 1}, texcoord = {0, 1}},
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-- Right face (+X)
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{position = { 0.5, -0.5, 0.5}, normal = { 1.0, 0.0, 0.0}, color = {1, 1, 1}, texcoord = {0, 0}},
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{position = { 0.5, -0.5, -0.5}, normal = { 1.0, 0.0, 0.0}, color = {1, 1, 1}, texcoord = {1, 0}},
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{position = { 0.5, 0.5, -0.5}, normal = { 1.0, 0.0, 0.0}, color = {1, 1, 1}, texcoord = {1, 1}},
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{position = { 0.5, 0.5, 0.5}, normal = { 1.0, 0.0, 0.0}, color = {1, 1, 1}, texcoord = {0, 1}},
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-- Left face (-X)
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{position = {-0.5, -0.5, -0.5}, normal = {-1.0, 0.0, 0.0}, color = {1, 1, 1}, texcoord = {0, 0}},
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{position = {-0.5, -0.5, 0.5}, normal = {-1.0, 0.0, 0.0}, color = {1, 1, 1}, texcoord = {1, 0}},
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{position = {-0.5, 0.5, 0.5}, normal = {-1.0, 0.0, 0.0}, color = {1, 1, 1}, texcoord = {1, 1}},
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{position = {-0.5, 0.5, -0.5}, normal = {-1.0, 0.0, 0.0}, color = {1, 1, 1}, texcoord = {0, 1}},
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}
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local indices = {
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-- Front
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0, 1, 2, 2, 3, 0,
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-- Back
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4, 5, 6, 6, 7, 4,
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-- Top
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8, 9, 10, 10, 11, 8,
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-- Bottom
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12, 13, 14, 14, 15, 12,
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-- Right
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16, 17, 18, 18, 19, 16,
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-- Left
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20, 21, 22, 22, 23, 20,
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}
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if double_sided then
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-- Add reversed winding order for back faces
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local reverse_indices = {
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-- Front (reversed)
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2, 1, 0, 0, 3, 2,
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-- Back (reversed)
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6, 5, 4, 4, 7, 6,
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-- Top (reversed)
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10, 9, 8, 8, 11, 10,
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-- Bottom (reversed)
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14, 13, 12, 12, 15, 14,
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-- Right (reversed)
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18, 17, 16, 16, 19, 18,
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-- Left (reversed)
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22, 21, 20, 20, 23, 22,
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}
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for i = 1, #reverse_indices do
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indices[#indices + 1] = reverse_indices[i]
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end
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end
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return vertices, indices
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end
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-- ============================================================================
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-- Transform Utilities
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-- ============================================================================
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--- Build a scale matrix manually (math3d doesn't have scale function)
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--- @param x number X-axis scale
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--- @param y number Y-axis scale
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--- @param z number Z-axis scale
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--- @return table 4x4 scale matrix
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local function scale_matrix(x, y, z)
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return {
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x, 0.0, 0.0, 0.0,
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0.0, y, 0.0, 0.0,
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0.0, 0.0, z, 0.0,
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0.0, 0.0, 0.0, 1.0,
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}
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end
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--- Build a static model matrix from position and scale
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--- @param position table {x, y, z} world position
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--- @param scale table {sx, sy, sz} scale factors
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--- @return table 4x4 matrix as flat array of 16 floats
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function framework.build_static_model_matrix(position, scale)
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local translation = math3d.translation(position[1], position[2], position[3])
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local scaling = scale_matrix(scale[1], scale[2], scale[3])
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return math3d.multiply(translation, scaling)
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end
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-- ============================================================================
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-- Scene Object Builders
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-- ============================================================================
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--- Create a static scene object (no animation)
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--- @param vertices table Vertex array
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--- @param indices table Index array
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--- @param position table {x, y, z} world position
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--- @param scale table {sx, sy, sz} scale factors
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--- @param shader_key string Material/shader identifier
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--- @param object_type string Semantic object type for identification
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--- @return table Scene object with standard structure
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function framework.create_static_object(vertices, indices, position, scale, shader_key, object_type)
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local model_matrix = framework.build_static_model_matrix(position, scale)
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local function compute_model_matrix()
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return model_matrix
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end
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return {
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vertices = vertices,
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indices = indices,
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compute_model_matrix = compute_model_matrix,
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shader_keys = {shader_key},
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object_type = object_type or "static",
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}
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end
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--- Create a static cube object with color
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--- @param position table {x, y, z} world position
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--- @param scale table {sx, sy, sz} scale factors
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--- @param color table {r, g, b} vertex color
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--- @param shader_key string Material/shader identifier
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--- @param object_type string Semantic object type
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--- @param cube_mesh table Optional pre-generated cube mesh {vertices, indices}
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--- @return table Scene object
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function framework.create_static_cube(position, scale, color, shader_key, object_type, cube_mesh)
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if not cube_mesh then
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cube_mesh = {framework.generate_cube_mesh(false)}
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end
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local vertices = cube_mesh[1] or cube_mesh.vertices
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local indices = cube_mesh[2] or cube_mesh.indices
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if color then
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vertices = framework.apply_color_to_vertices(vertices, color)
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end
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return framework.create_static_object(vertices, indices, position, scale, shader_key, object_type)
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end
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--- Create a dynamic scene object with animation callback
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--- @param vertices table Vertex array
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--- @param indices table Index array
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--- @param compute_fn function Function(time) -> matrix that computes model matrix
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--- @param shader_key string Material/shader identifier
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--- @param object_type string Semantic object type
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--- @return table Scene object with dynamic transform
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function framework.create_dynamic_object(vertices, indices, compute_fn, shader_key, object_type)
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return {
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vertices = vertices,
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indices = indices,
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compute_model_matrix = compute_fn,
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shader_keys = {shader_key},
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object_type = object_type or "dynamic",
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}
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end
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-- ============================================================================
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-- Material Registry
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-- ============================================================================
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framework.MaterialRegistry = {}
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framework.MaterialRegistry.__index = framework.MaterialRegistry
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function framework.MaterialRegistry.new(config)
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local self = setmetatable({}, framework.MaterialRegistry)
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self.materials = {}
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self.default_key = nil
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local materials = config_resolver.resolve_materialx_materials(config)
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if type(materials) == "table" then
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for i, mat in ipairs(materials) do
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if mat.shader_key then
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self.materials[mat.shader_key] = mat
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if i == 1 then
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self.default_key = mat.shader_key
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end
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end
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end
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end
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return self
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end
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function framework.MaterialRegistry:get(shader_key)
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return self.materials[shader_key]
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end
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function framework.MaterialRegistry:get_key(shader_key)
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if self.materials[shader_key] then
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return shader_key
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end
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return self.default_key
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end
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function framework.MaterialRegistry:has(shader_key)
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return self.materials[shader_key] ~= nil
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end
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return framework
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