From bd62b8a528de1f5e84234e0243451b649c7dd3a0 Mon Sep 17 00:00:00 2001
From: samstalhandske <samstalhandske@hotmail.com>
Date: Wed, 26 Nov 2025 11:32:12 +0100
Subject: [PATCH] Added translations.

---
 pass.odin                            |  3 +++
 renderer.odin                        | 22 +++++++++++++++++++---
 renderer_backend_opengl_windows.odin |  9 +++++++--
 3 files changed, 29 insertions(+), 5 deletions(-)

diff --git a/pass.odin b/pass.odin
index 6d534e6..fa4f249 100644
--- a/pass.odin
+++ b/pass.odin
@@ -15,6 +15,9 @@ Pass :: struct {
 Draw_Command :: struct {
     mesh: Mesh,
     material: Material,
+    position: [3]f32,
+    scale: [3]f32,
+    // TODO: SS - Add rotation.
 }
 
 add_command_to_pass :: proc(pass: ^Pass, command: Draw_Command) -> bool {
diff --git a/renderer.odin b/renderer.odin
index 06d0cc2..1be885d 100644
--- a/renderer.odin
+++ b/renderer.odin
@@ -1,5 +1,6 @@
 package renderer
 
+import "core:math/linalg"
 import "core:fmt"
 import "core:log"
 
@@ -81,8 +82,23 @@ render_frame :: proc(renderer: ^Renderer) {
         
         for i in 0..<pass.draw_command_count {
             command := &pass.draw_commands[i]
+            
+            transform := linalg.identity(linalg.Matrix4x4f32)
 
-            activate_material(&command.material)
+            scale       := linalg.matrix4_scale(command.scale)
+            rotation    := linalg.matrix4_rotate(0, [3]f32 { 0, 0, 1 })
+            translation := linalg.matrix4_translate(command.position)
+
+            // Scale.
+            transform *= scale
+
+            // Rotate.
+            transform *= rotation
+
+            // Translate.
+            transform *= translation
+
+            activate_material(&command.material, transform)
 
             draw_mesh(&command.mesh)
         }
@@ -107,11 +123,11 @@ destroy :: proc(renderer: ^Renderer) {
     free(renderer)
 }
 
-@(private) activate_material :: proc(material: ^Material) {
+@(private) activate_material :: proc(material: ^Material, transform: linalg.Matrix4x4f32) {
     assert(material != nil)
 
     when RENDER_BACKEND_OPENGL {
-        opengl_activate_material(material)
+        opengl_activate_material(material, transform)
     }
 }
 
diff --git a/renderer_backend_opengl_windows.odin b/renderer_backend_opengl_windows.odin
index dd97603..0472b20 100644
--- a/renderer_backend_opengl_windows.odin
+++ b/renderer_backend_opengl_windows.odin
@@ -1,6 +1,7 @@
 #+private
 package renderer
 
+import "core:math/linalg"
 import "core:bytes"
 import "core:slice"
 import "core:image"
@@ -238,11 +239,15 @@ when RENDER_BACKEND_OPENGL {
         gl.DeleteProgram(shader_program.backend.handle)
     }
 
-    opengl_activate_material :: proc(material: ^Material) {
+    opengl_activate_material :: proc(material: ^Material, transform: linalg.Matrix4x4f32) {
         gl.UseProgram(material.shader_program.backend.handle)
-        
+
         gl.ActiveTexture(gl.TEXTURE0)
         gl.BindTexture(gl.TEXTURE_2D, material.texture.backend.handle)
+
+        transform_loc := gl.GetUniformLocation(material.shader_program.backend.handle, "in_transform")
+        transform_as_f32_array := transmute([16]f32)(transform)
+        gl.UniformMatrix4fv(transform_loc, 1, false, &transform_as_f32_array[0])
     }
 
     opengl_draw_mesh :: proc(mesh: ^Mesh) {