From 51318fc77f0cee06768059a3221ad539f187a6c0 Mon Sep 17 00:00:00 2001
From: Ivan Avdeev <me@w23.ru>
Date: Wed, 12 Apr 2023 09:58:11 -0700
Subject: [PATCH] vk: read alpha for material base_color, fixes #308

---
 ref/vk/vk_materials.c | 11 +++--------
 ref/vk/vk_materials.h |  2 +-
 ref/vk/vk_ray_model.c |  2 +-
 3 files changed, 5 insertions(+), 10 deletions(-)

diff --git a/ref/vk/vk_materials.c b/ref/vk/vk_materials.c
index eb3ae67d..2aacbc0c 100644
--- a/ref/vk/vk_materials.c
+++ b/ref/vk/vk_materials.c
@@ -16,7 +16,7 @@ static const xvk_material_t k_default_material = {
 
 		.metalness = 0.f,
 		.roughness = 1.f,
-		.base_color = { 1.f, 1.f, 1.f },
+		.base_color = { 1.f, 1.f, 1.f, 1.f },
 
 		.set = false,
 };
@@ -58,12 +58,7 @@ static void loadMaterialsFromFile( const char *filename, int depth ) {
 	const char *path_end = Q_strrchr(filename, '/');
 	byte *data = gEngine.fsapi->LoadFile( filename, 0, false );
 	char *pos = (char*)data;
-	xvk_material_t current_material = {
-		.base_color = -1,
-		.metalness = tglob.blackTexture,
-		.roughness = tglob.whiteTexture,
-		.tex_normalmap = 0,
-	};
+	xvk_material_t current_material = k_default_material;
 	int current_material_index = -1;
 	qboolean force_reload = false;
 	qboolean create = false;
@@ -150,7 +145,7 @@ static void loadMaterialsFromFile( const char *filename, int depth ) {
 			} else if (Q_stricmp(key, "metalness") == 0) {
 				sscanf(value, "%f", &current_material.metalness);
 			} else if (Q_stricmp(key, "base_color") == 0) {
-				sscanf(value, "%f %f %f", &current_material.base_color[0], &current_material.base_color[1], &current_material.base_color[2]);
+				sscanf(value, "%f %f %f %f", &current_material.base_color[0], &current_material.base_color[1], &current_material.base_color[2], &current_material.base_color[3]);
 			} else {
 				gEngine.Con_Printf(S_ERROR "Unknown material key %s\n", key);
 				continue;
diff --git a/ref/vk/vk_materials.h b/ref/vk/vk_materials.h
index 9b802094..e7f7c7c7 100644
--- a/ref/vk/vk_materials.h
+++ b/ref/vk/vk_materials.h
@@ -8,7 +8,7 @@ typedef struct {
 	int tex_metalness;
 	int tex_normalmap;
 
-	vec3_t base_color;
+	vec4_t base_color;
 	float roughness;
 	float metalness;
 
diff --git a/ref/vk/vk_ray_model.c b/ref/vk/vk_ray_model.c
index 8243a683..5c76c5f8 100644
--- a/ref/vk/vk_ray_model.c
+++ b/ref/vk/vk_ray_model.c
@@ -194,7 +194,7 @@ static void applyMaterialToKusok(vk_kusok_data_t* kusok, const vk_render_geometr
 		gcolor[0] = color[0] * mat->base_color[0];
 		gcolor[1] = color[1] * mat->base_color[1];
 		gcolor[2] = color[2] * mat->base_color[2];
-		gcolor[3] = color[3];
+		gcolor[3] = color[3] * mat->base_color[3];
 		Vector4Copy(gcolor, kusok->color);
 	}