diff options
Diffstat (limited to 'honey/ecs-systems.lua')
| -rw-r--r-- | honey/ecs-systems.lua | 236 |
1 files changed, 118 insertions, 118 deletions
diff --git a/honey/ecs-systems.lua b/honey/ecs-systems.lua index 18f50a8..9995304 100644 --- a/honey/ecs-systems.lua +++ b/honey/ecs-systems.lua @@ -1,118 +1,118 @@ -local ecs = require 'honey.ecs'
-local gl = honey.gl
-local glfw = honey.glfw
-
-
-local module = {}
-setmetatable(module, {__index=_G})
-setfenv(1, module)
-
-
-
---===== transform cascading =====--
-
-transform = function(params)
- return {
- db = params.db,
- update = function(self, dt)
- local entities = self.db:queryComponent("transform")
-
- -- prepare transforms
- for id, transform in pairs(entities) do
- transform._visited = false
- end
-
- -- helper function
- local function recursiveTransform(transform)
- if transform._visited then
- return transform._matrix
- end
-
- if not transform.parent then
- transform._matrix = transform.matrix
- else
- local parentTransform = self.db:getComponent(transform.parent, "transform")
- local parentMatrix = recursiveTransform(parentTransform)
- transform._matrix = parentMatrix * transform.matrix
- end
- transform._visited = true
- return transform._matrix
- end
-
- -- compute transforms
- for id, transform in pairs(entities) do
- recursiveTransform(transform)
- end
- end,
- priority = 0,
- }
-end
-
-
-
---===== rendering =====--
-
-function renderCamera(params)
- return {
- camera = params.camera,
- db = params.db,
- priority = params.priority or 99,
- update = function(self, dt)
- local cameraParams = self.db:getComponent(self.camera, "camera")
- local cameraTransform = self.db:getComponent(self.camera, "transform")
- local view
- if cameraTransform then
- view = cameraTransform._matrix
- else
- view = Mat4():identity()
- end
-
- local entities = self.db:queryComponent("renderMesh")
- for entity, tbl in pairs(entities) do
- -- get shader
- local shader = honey.shader.loadShader(tbl.shader.vertex, tbl.shader.fragment)
- shader:use()
-
- -- bind textures
- local texOffset = 0
- for name, texTbl in pairs(tbl.textures or {}) do
- local texture = honey.image.loadImage(texTbl.filename, texTbl.params)
- gl.BindTexture(gl.TEXTURE_2D + texOffset, texture.texture)
- shader:setInt(name, texOffset)
- texOffset = texOffset + 1
- end
-
- -- configure default uniforms
- local query = self.db:getComponent(entity, "transform")
- local model = (query and query._matrix) or Mat4():identity()
- shader:configure{
- float={
- time=glfw.GetTime(),
- },
- matrix={
- view=view,
- projection=cameraParams.projection,
- model=model,
- },
- }
-
- -- draw mesh
- local mesh = honey.mesh.loadMesh(tbl.mesh.filename, tbl.mesh.index)
- mesh:drawElements()
-
- -- unbind textures
- for i=0,texOffset-1 do
- gl.BindTexture(gl.TEXTURE_2D + i, 0)
- end
- end
- end,
- }
-end
-
-
-
---===== update functions =====--
-
-
-
-return module
+local ecs = require 'honey.ecs' +local gl = honey.gl +local glfw = honey.glfw + + +local module = {} +setmetatable(module, {__index=_G}) +setfenv(1, module) + + + +--===== transform cascading =====-- + +transform = function(params) + return { + db = params.db, + update = function(self, dt) + local entities = self.db:queryComponent("transform") + + -- prepare transforms + for id, transform in pairs(entities) do + transform._visited = false + end + + -- helper function + local function recursiveTransform(transform) + if transform._visited then + return transform._matrix + end + + if not transform.parent then + transform._matrix = transform.matrix + else + local parentTransform = self.db:getComponent(transform.parent, "transform") + local parentMatrix = recursiveTransform(parentTransform) + transform._matrix = parentMatrix * transform.matrix + end + transform._visited = true + return transform._matrix + end + + -- compute transforms + for id, transform in pairs(entities) do + recursiveTransform(transform) + end + end, + priority = 0, + } +end + + + +--===== rendering =====-- + +function renderCamera(params) + return { + camera = params.camera, + db = params.db, + priority = params.priority or 99, + update = function(self, dt) + local cameraParams = self.db:getComponent(self.camera, "camera") + local cameraTransform = self.db:getComponent(self.camera, "transform") + local view + if cameraTransform then + view = cameraTransform._matrix + else + view = Mat4():identity() + end + + local entities = self.db:queryComponent("renderMesh") + for entity, tbl in pairs(entities) do + -- get shader + local shader = honey.shader.loadShader(tbl.shader.vertex, tbl.shader.fragment) + shader:use() + + -- bind textures + local texOffset = 0 + for name, texTbl in pairs(tbl.textures or {}) do + local texture = honey.image.loadImage(texTbl.filename, texTbl.params) + gl.BindTexture(gl.TEXTURE_2D + texOffset, texture.texture) + shader:setInt(name, texOffset) + texOffset = texOffset + 1 + end + + -- configure default uniforms + local query = self.db:getComponent(entity, "transform") + local model = (query and query._matrix) or Mat4():identity() + shader:configure{ + float={ + time=glfw.GetTime(), + }, + matrix={ + view=view, + projection=cameraParams.projection, + model=model, + }, + } + + -- draw mesh + local mesh = honey.mesh.loadMesh(tbl.mesh.filename, tbl.mesh.index) + mesh:drawElements() + + -- unbind textures + for i=0,texOffset-1 do + gl.BindTexture(gl.TEXTURE_2D + i, 0) + end + end + end, + } +end + + + +--===== update functions =====-- + + + +return module |