From f9a16f61f54993f3ae570b168ee15fc311229d91 Mon Sep 17 00:00:00 2001
From: onelin <oscar@nelin.dk>
Date: Sat, 22 Mar 2025 15:52:57 +0100
Subject: Brewing

---
 src/rendering/include/engine/rendering/rendering.h | 24 +++++++++++++++++++++-
 1 file changed, 23 insertions(+), 1 deletion(-)

(limited to 'src/rendering/include')

diff --git a/src/rendering/include/engine/rendering/rendering.h b/src/rendering/include/engine/rendering/rendering.h
index c5f805e..ffc6267 100644
--- a/src/rendering/include/engine/rendering/rendering.h
+++ b/src/rendering/include/engine/rendering/rendering.h
@@ -57,6 +57,12 @@ typedef struct {
   u32 program;
 } Shader;
 
+typedef struct {
+  vec3 position;
+  vec3 size;
+  mat4 rotation;
+} Transform;
+
 typedef enum {
   ShaderBufferFlag_none = 0x00,
 
@@ -72,7 +78,8 @@ typedef enum {
 
   // Next 3 bytes describe the buffer type
   ShaderBuffer_Type_vertexData         = 0b0000001000000, // 64
-  ShaderBuffer_Type_vertexIndex        = 0b0000010000000, // 128
+  ShaderBuffer_Type_vertexPosition     = 0b0000010000000, // 128
+  ShaderBuffer_Type_vertexIndex        = 0b0000011000000, // 192
 
   // Next 4 bytes are designated for the data type
   ShaderBuffer_DataType_nil            = 0b0001000000000, //  512
@@ -146,6 +153,13 @@ typedef struct {
   ShaderBuffer* buffer;
 } RenderObject;
 
+typedef struct {
+  // Index of the model in the RenderBatch models buffer
+  usize model_idx;
+  // The transformation of the model
+  Transform transorm;
+} BatchModelInstance;
+
 typedef struct {
   // Size of models buffer
   usize msize;
@@ -154,6 +168,13 @@ typedef struct {
   // Pointers to original models in this batch
   RenderObject **models;
 
+  // Size of instance buffer
+  usize inst_size;
+  // number of instances in the `instances` buffer
+  usize inst_count;
+  // Pointers to original models in this batch
+  BatchModelInstance *instances;
+
   // The rendered destination object
   RenderObject renderobj;
 } RenderBatch;
@@ -252,6 +273,7 @@ RenderObject RenderObject_new(
 
 int renderbatch_new(RenderBatch* renderbatch, usize count);
 int renderbatch_add(RenderBatch* renderbatch, RenderObject* obj);
+i32 renderbatch_add_ext(RenderBatch* renderbatch, RenderObject* obj, Transform* t);
 int renderbatch_refresh(RenderBatch* renderbatch);
 
 Shader compile_shader(const char* file_path, const ShaderType shader_type);
-- 
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