add empty grid system

8 files changed, 158 insertions, 11 deletions

diff --git a/assets/shaders/grid.frag b/assets/shaders/grid.frag
new file mode 100644
index 0000000..5bce13b
--- /dev/null
+++ b/assets/shaders/grid.frag
@@ -0,0 +1,7 @@
+#version 410 core
+
+out vec4 FragColor;
+
+void main() {
+    FragColor = vec4(1.0);
+}
\ No newline at end of file
diff --git a/assets/shaders/grid.vert b/assets/shaders/grid.vert
new file mode 100644
index 0000000..a98eabe
--- /dev/null
+++ b/assets/shaders/grid.vert
@@ -0,0 +1,11 @@
+#version 410 core
+
+uniform Camera {
+  mat4 view;
+  mat4 proj;
+  vec4 viewPos;
+} cam;
+
+void main() {
+  gl_Position =  vec4(1.0);
+}
\ No newline at end of file
diff --git a/bindgen/rust/src/ral.rs b/bindgen/rust/src/ral.rs
index 775335a..2941275 100644
--- a/bindgen/rust/src/ral.rs
+++ b/bindgen/rust/src/ral.rs
@@ -1,15 +1,20 @@
 //! Wrapper around the RAL code in celeritas-core
 
+use std::{os::raw::c_void, ptr};
+
 use celeritas_sys::{
-    BufferHandle, GPU_CmdEncoder, GPU_CmdEncoder_BeginRender, GPU_CmdEncoder_EndRender,
-    GPU_GetDefaultEncoder,
+    BufferHandle, GPU_CmdEncoder, GPU_CmdEncoder_BeginRender, GPU_CmdEncoder_EndRender, GPU_GetDefaultEncoder, GPU_GetDefaultRenderpass, GPU_GraphicsPipeline_Create, GraphicsPipelineDesc, ShaderData
 };
 
+/// Holds a pointer to the raw `GPU_CmdEncoder`
 pub struct FrameRenderEncoder(*mut GPU_CmdEncoder);
 
-/// Holds a pointer into the raw `GPU_Renderpass`
+/// Holds a pointer to the raw `GPU_Renderpass`
 pub struct RenderPass(*mut celeritas_sys::GPU_Renderpass);
 
+/// Holds a pointer to the raw `GPU_Pipeline`
+pub struct Pipeline(*mut celeritas_sys::GPU_Pipeline);
+
 impl FrameRenderEncoder {
     pub fn new(renderpass: &RenderPass) -> Self {
         let enc = unsafe {
@@ -42,6 +47,45 @@ impl FrameRenderEncoder {
     }
 }
 
+pub struct PipelineBuilder {
+    renderpass: Option<RenderPass>,
+    data_layouts: Vec<()>,
+
+}
+impl PipelineBuilder {
+    // pub fn add_
+
+    pub fn build(self) -> Pipeline {
+        let shad = ShaderData {
+            get_layout: todo!(),
+            data: ptr::null_mut()
+        };
+        let desc = GraphicsPipelineDesc {
+            debug_name: todo!(),
+            vertex_desc: todo!(),
+            vs: todo!(),
+            fs: todo!(),
+            data_layouts: todo!(),
+            data_layouts_count: todo!(),
+            wireframe: todo!(),
+            depth_test: todo!(),
+        };
+        let p = unsafe { GPU_GraphicsPipeline_Create(
+            todo!(),
+            self.renderpass.map(|r| r.0).unwrap_or(GPU_GetDefaultRenderpass())
+        ) };
+        Pipeline(p)
+    }
+}
+// impl Default for PipelineBuilder {
+//     fn default() -> Self {
+//         Self {
+//             renderpass: Default::default(),
+            
+//         }
+//     }
+// }
+
 // --- types
 
 #[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
diff --git a/examples/game_demo/game_demo.c b/examples/game_demo/game_demo.c
index c510ee0..2362a2e 100644
--- a/examples/game_demo/game_demo.c
+++ b/examples/game_demo/game_demo.c
@@ -74,10 +74,11 @@ int main() {
   crate_mat.metallic = 0.0;
   MaterialHandle crate_mat_handle = Material_pool_insert(Render_GetMaterialPool(), &crate_mat);
   // ModelHandle cube_handle = ModelLoad_gltf("assets/models/gltf/Cube/glTF/Cube.gltf", false);
-  ModelHandle cube_handle = ModelLoad_gltf("assets/models/gltf/DamagedHelmet/glTF/DamagedHelmet.gltf", false);
- 
+  ModelHandle cube_handle =
+      ModelLoad_gltf("assets/models/gltf/DamagedHelmet/glTF/DamagedHelmet.gltf", false);
+
   RenderEnt_darray* render_entities = RenderEnt_darray_new(1);
-  
+
   // --- Transforms
   // TransformHierarchy* scene_tree =  TransformHierarchy_Create();
   // TODO: parent camera to model - to start with I can just manually update it every frame
@@ -95,9 +96,10 @@ int main() {
     SetCamera(cam);
 
     // BEGIN Draw calls
-    RenderEnt_darray_clear(render_entities); // we re-extract every frame
+    RenderEnt_darray_clear(render_entities);  // we re-extract every frame
     Quat rot = quat_from_axis_angle(VEC3_X, -HALF_PI, true);
-    ModelExtractRenderEnts(render_entities, cube_handle, mat4_rotation(rot), REND_ENT_CASTS_SHADOWS);
+    ModelExtractRenderEnts(render_entities, cube_handle, mat4_rotation(rot),
+                           REND_ENT_CASTS_SHADOWS);
 
     // Shadow_Run(entities, entity_count);
 
diff --git a/src/core/core.c b/src/core/core.c
index b18b807..bb30ced 100644
--- a/src/core/core.c
+++ b/src/core/core.c
@@ -80,6 +80,4 @@ GLFWwindow* Core_GetGlfwWindowPtr(Core* core) { return g_core.window; }
 
 struct Renderer* Core_GetRenderer(Core* core) { return core->renderer; }
 
-Model* Model_Get(ModelHandle h) {
-  return Model_pool_get(&g_core.models, h);
-}
\ No newline at end of file
+Model* Model_Get(ModelHandle h) { return Model_pool_get(&g_core.models, h); }
\ No newline at end of file
diff --git a/src/new_render/render.c b/src/new_render/render.c
index 9314871..54ea32a 100644
--- a/src/new_render/render.c
+++ b/src/new_render/render.c
@@ -7,6 +7,7 @@
 #include <glfw3.h>
 #include "camera.h"
 #include "core.h"
+#include "grid.h"
 #include "log.h"
 #include "maths.h"
 #include "maths_types.h"
@@ -43,6 +44,7 @@ struct Renderer {
   PBR_Storage* pbr;
   Shadow_Storage* shadows;
   Terrain_Storage* terrain;
+  Grid_Storage* grid;
   // Text_Storage* text;
   ResourcePools* resource_pools;
   Mesh_pool mesh_pool;
@@ -139,8 +141,12 @@ bool Renderer_Init(RendererConfig config, Renderer* ren, GLFWwindow** out_window
   ren->terrain = malloc(sizeof(Terrain_Storage));
   Terrain_Init(ren->terrain);
 
+  ren->grid = calloc(1, sizeof(Grid_Storage));
+  Grid_Init(ren->grid);
+
   // load default textures
   ren->white_1x1 = TextureLoadFromFile("assets/textures/white1x1.png");
+  // TODO: black_1x1
 
   return true;
 }
diff --git a/src/systems/grid.c b/src/systems/grid.c
new file mode 100644
index 0000000..20e3657
--- /dev/null
+++ b/src/systems/grid.c
@@ -0,0 +1,59 @@
+#include "grid.h"
+#include "file.h"
+#include "log.h"
+#include "maths_types.h"
+#include "primitives.h"
+#include "ral_common.h"
+#include "ral_impl.h"
+#include "ral_types.h"
+#include "render.h"
+#include "render_types.h"
+#include "shader_layouts.h"
+
+void Grid_Init(Grid_Storage* storage) {
+  INFO("Infinite Grid initialisation");
+  Geometry plane_geo = Geo_CreatePlane(f32x2(1.0, 1.0));
+  Mesh plane_mesh = Mesh_Create(&plane_geo, true);
+  storage->plane_vertices = plane_mesh.vertex_buffer;
+  storage->plane_indices = plane_mesh.index_buffer;
+
+  GPU_RenderpassDesc rpass_desc = {
+    .default_framebuffer = true,
+  };
+  storage->renderpass = GPU_Renderpass_Create(rpass_desc);
+
+  arena scratch = arena_create(malloc(1024 * 1024), 1024 * 1024);
+
+  Str8 vert_path = str8("assets/shaders/grid.vert");
+  Str8 frag_path = str8("assets/shaders/grid.frag");
+  str8_opt vertex_shader = str8_from_file(&scratch, vert_path);
+  str8_opt fragment_shader = str8_from_file(&scratch, frag_path);
+  if (!vertex_shader.has_value || !fragment_shader.has_value) {
+    ERROR_EXIT("Failed to load shaders from disk")
+  }
+
+  ShaderData camera_data = { .get_layout = &Binding_Camera_GetLayout };
+
+  GraphicsPipelineDesc pipeline_desc = {
+    .debug_name = "Infinite grid pipeline",
+    .vertex_desc = static_3d_vertex_description(),
+    .data_layouts = { camera_data },
+    .data_layouts_count = 1,
+    .vs = {
+      .debug_name = "Grid vertex shader",
+      .filepath = vert_path,
+      .code = vertex_shader.contents,
+    },
+    .fs = {
+      .debug_name = "Grid fragment shader",
+      .filepath = frag_path,
+      .code = fragment_shader.contents,
+    },
+    .wireframe = false,
+  };
+  storage->pipeline = GPU_GraphicsPipeline_Create(pipeline_desc, storage->renderpass);
+}
+
+void Grid_Draw(Grid_Storage* storage) {
+
+}
\ No newline at end of file
diff --git a/src/systems/grid.h b/src/systems/grid.h
new file mode 100644
index 0000000..7d983dc
--- /dev/null
+++ b/src/systems/grid.h
@@ -0,0 +1,20 @@
+#pragma once
+
+#include "ral_impl.h"
+#include "ral_types.h"
+
+typedef struct Grid_Storage {
+  GPU_Renderpass* renderpass;
+  GPU_Pipeline* pipeline;
+  BufferHandle plane_vertices;
+  BufferHandle plane_indices;
+} Grid_Storage;
+
+// --- Public API
+void Grid_Init(Grid_Storage* storage);
+// void Grid_Shutdown(Grid_Storage* storage);
+void Grid_Draw(Grid_Storage* storage);
+
+// --- Internal
+// typedef struct GridUniforms {} GridUniforms;
+// ShaderDataLayout GridUniforms_GetLayout(void* data);
\ No newline at end of file