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Richard Ward
2025-12-18 19:13:31 +00:00
parent 7d83fc3ae9
commit 3ca9ce773d
8 changed files with 218 additions and 161 deletions
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74
scripts/cube_logic.lua
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@@ -35,6 +35,8 @@ local pyramid_indices = {
4, 5, 2,
}
local math3d = require("math3d")
local rotation_speeds = {x = 0.5, y = 0.7}
local shader_variants = {
@@ -52,62 +54,26 @@ local shader_variants = {
},
}
local function rotation_y(radians)
local c = math.cos(radians)
local s = math.sin(radians)
return {
c, 0.0, -s, 0.0,
0.0, 1.0, 0.0, 0.0,
s, 0.0, c, 0.0,
0.0, 0.0, 0.0, 1.0,
}
end
local function rotation_x(radians)
local c = math.cos(radians)
local s = math.sin(radians)
return {
1.0, 0.0, 0.0, 0.0,
0.0, c, s, 0.0,
0.0, -s, c, 0.0,
0.0, 0.0, 0.0, 1.0,
}
end
local function multiply_matrices(a, b)
local result = {}
for row = 1, 4 do
for col = 1, 4 do
local sum = 0.0
for idx = 1, 4 do
sum = sum + a[(idx - 1) * 4 + row] * b[(col - 1) * 4 + idx]
end
result[(col - 1) * 4 + row] = sum
end
end
return result
end
local function translation(x, y, z)
return {
1.0, 0.0, 0.0, 0.0,
0.0, 1.0, 0.0, 0.0,
0.0, 0.0, 1.0, 0.0,
x, y, z, 1.0,
}
end
local camera = {
eye = {2.0, 2.0, 2.5},
center = {0.0, 0.0, 0.0},
up = {0.0, 1.0, 0.0},
fov = 0.78,
near = 0.1,
far = 10.0,
}
local function build_model(time)
local y = rotation_y(time * rotation_speeds.y)
local x = rotation_x(time * rotation_speeds.x)
return multiply_matrices(y, x)
local y = math3d.rotation_y(time * rotation_speeds.y)
local x = math3d.rotation_x(time * rotation_speeds.x)
return math3d.multiply(y, x)
end
local function create_cube(position, speed_scale, shader_key)
local function compute_model_matrix(time)
local base = build_model(time * speed_scale)
local offset = translation(position[1], position[2], position[3])
return multiply_matrices(offset, base)
local offset = math3d.translation(position[1], position[2], position[3])
return math3d.multiply(offset, base)
end
return {
@@ -121,8 +87,8 @@ end
local function create_pyramid(position, shader_key)
local function compute_model_matrix(time)
local base = build_model(time * 0.6)
local offset = translation(position[1], position[2], position[3])
return multiply_matrices(offset, base)
local offset = math3d.translation(position[1], position[2], position[3])
return math3d.multiply(offset, base)
end
return {
@@ -145,3 +111,9 @@ end
function get_shader_paths()
return shader_variants
end
function get_view_projection(aspect)
local view = math3d.look_at(camera.eye, camera.center, camera.up)
local projection = math3d.perspective(camera.fov, aspect, camera.near, camera.far)
return math3d.multiply(projection, view)
end