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collada_scene: node_instance: store transform table

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This commit is contained in:
Zack Buhman 2026-02-24 19:03:51 +00:00
parent 12d2f8ffb7
commit 491de45834
2 changed files with 81 additions and 28 deletions
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103
collada_scene.lua
View File

@ -53,7 +53,67 @@ collada_scene = {
end
end,
node_world_transform = function(node)
load_transform = function(transform)
if transform.type == collada_types.transform_type.LOOKAT then
assert(false)
elseif transform.type == collada_types.transform_type.MATRIX then
return mat4.load_table(transform.matrix)
elseif transform.type == collada_types.transform_type.ROTATE then
return vec4.load_table(transform.rotate)
elseif transform.type == collada_types.transform_type.SCALE then
return vec3.load_table(transform.scale)
elseif transform.type == collada_types.transform_type.TRANSLATE then
return vec3.load_table(transform.translate)
else
assert(false)
end
end,
transform_matrix = function (loaded_transform)
local type = loaded_transform.type
local value = loaded_transform.value
if type == collada_types.transform_type.LOOKAT then
assert(false)
elseif type == collada_types.transform_type.MATRIX then
return value
elseif type == collada_types.transform_type.ROTATE then
return mat4.rotation_axis(value, scalar.convert_to_radians(value.f[3]))
elseif type == collada_types.transform_type.SCALE then
return mat4.scaling_from_vector(value)
elseif type == collada_types.transform_type.TRANSLATE then
return mat4.translation_from_vector(value)
else
assert(false)
end
end,
--
-- node instance
--
-- {
-- transforms = ..,
-- transforms_count = ..,
-- world = ..,
-- }
node_instance_initialize_transforms = function(node)
local transforms = {}
local transform_index = 0
for _, transform in ipairs(node.transforms) do
local value = collada_scene.load_transform(transform)
local loaded_transform = {
type = transform.type,
value = value,
}
transforms[transform_index] = loaded_transform
transform_index = transform_index + 1
end
return transforms, transform_index
end,
node_instance_world = function(node, transforms, transforms_count)
local world
if node.parent_index >= 0 then
world = node_instances[node.parent_index].world
@ -62,34 +122,31 @@ collada_scene = {
world = mat4.identity()
end
for _, transform in ipairs(node.transforms) do
local m
if transform.type == collada_types.transform_type.LOOKAT then
assert(false)
elseif transform.type == collada_types.transform_type.MATRIX then
m = mat4.load_table(transform.matrix)
elseif transform.type == collada_types.transform_type.ROTATE then
local rotate = vec4.load_table(transform.rotate)
local w = rotate.f[3]
m = mat4.rotation_axis(rotate, scalar.convert_to_radians(w))
elseif transform.type == collada_types.transform_type.SCALE then
m = mat4.scaling_from_vector(vec3.load_table(transform.scale))
elseif transform.type == collada_types.transform_type.TRANSLATE then
m = mat4.translation_from_vector(vec3.load_table(transform.translate))
else
assert(false)
end
local transform_index = 0
while transform_index < transforms_count do
local m = collada_scene.transform_matrix(transforms[transform_index])
world = m * world
transform_index = transform_index + 1
end
return world
end,
load_node_world_transforms = function(nodes)
node_instance_initialize = function(node)
local transforms, transforms_count = collada_scene.node_instance_initialize_transforms(node)
local world = collada_scene.node_instance_world(node, transforms, transforms_count)
local node_instance = {
transforms = transforms,
transforms_count = transforms_count,
world = world,
}
return node_instance
end,
load_node_instances = function(nodes)
local node_index = 0
for _, node in ipairs(nodes) do
world = collada_scene.node_world_transform(node)
node_instances[node_index] = { world = world }
local node_instance = collada_scene.node_instance_initialize(node)
node_instances[node_index] = node_instance
node_index = node_index + 1
end
end,
@ -189,6 +246,6 @@ collada_scene = {
return {
draw_nodes = collada_scene.draw_nodes,
load_buffers = collada_scene.load_buffers,
load_node_world_transforms = collada_scene.load_node_world_transforms,
load_node_instances = collada_scene.load_node_instances,
load_images = collada_scene.load_images,
}

6
main.lua
View File

@ -14,8 +14,8 @@ function love.load(args)
love.window.setMode(1024, 1024, {depth=true})
collada_scene.load_buffers()
collada_scene.load_node_world_transforms(scene_test.descriptor.nodes)
collada_scene.load_images("scene/test", scene_test.descriptor.images)
collada_scene.load_node_instances(scene_test.descriptor.nodes)
end
local rotation = 0.0
@ -26,10 +26,6 @@ function love.draw()
width, height = love.graphics.getDimensions()
-- local projection = mat4.perspective_rh(width / width * 0.1,
-- height / width * 0.1,
-- 0.1,
-- 1000.0)
local aspect_ratio = width / height
local projection = mat4.perspective_fov_rh(scalar.convert_to_radians(45 / 2),
aspect_ratio,