From bd8b6ae3769242182c1fdf4b323e3ce4770c6e57 Mon Sep 17 00:00:00 2001
From: myaaaaaaaaa <103326468+myaaaaaaaaa@users.noreply.github.com>
Date: Wed, 6 Nov 2024 15:58:33 -0500
Subject: [PATCH] Implement a basic glTF exporter for materials

---
 addons/material_maker/nodes/material.mmg | 247 +++++++++++++++++++++++
 1 file changed, 247 insertions(+)

diff --git a/addons/material_maker/nodes/material.mmg b/addons/material_maker/nodes/material.mmg
index 8470ce7ad..a2180215f 100644
--- a/addons/material_maker/nodes/material.mmg
+++ b/addons/material_maker/nodes/material.mmg
@@ -83,6 +83,253 @@
 					}
 				]
 			},
+			"GLTF/Plane": {
+				"export_extension": "gltf",
+				"files": [
+					{
+						"conditions": "$(connected:albedo_tex)",
+						"file_name": "$(path_prefix)_albedo.png",
+						"output": 0,
+						"type": "texture"
+					},
+					{
+						"conditions": "$(connected:ao_tex) or $(connected:roughness_tex) or $(connected:metallic_tex)",
+						"file_name": "$(path_prefix)_orm.png",
+						"output": 1,
+						"type": "texture"
+					},
+					{
+						"conditions": "$(connected:emission_tex)",
+						"file_name": "$(path_prefix)_emission.png",
+						"output": 2,
+						"type": "texture"
+					},
+					{
+						"conditions": "$(connected:normal_tex)",
+						"file_name": "$(path_prefix)_normal.png",
+						"output": 3,
+						"type": "texture"
+					},
+					{
+						"file_name": "$(path_prefix).gltf",
+						"prompt_overwrite": true,
+						"template": [
+							"{",
+							"\t\"asset\":{",
+							"\t\t\"generator\":\"Material Maker export\",",
+							"\t\t\"version\":\"2.0\"",
+							"\t},",
+							"\t\"scene\":0,",
+							"\t\"scenes\":[",
+							"\t\t{",
+							"\t\t\t\"name\":\"Scene\",",
+							"\t\t\t\"nodes\":[",
+							"\t\t\t\t0",
+							"\t\t\t]",
+							"\t\t}",
+							"\t],",
+							"\t\"nodes\":[",
+							"\t\t{",
+							"\t\t\t\"mesh\":0,",
+							"\t\t\t\"name\":\"Plane\"",
+							"\t\t}",
+							"\t],",
+							"\t\"materials\":[",
+							"\t\t{",
+							"\t\t\t\"doubleSided\":true,",
+							"\t\t\t\"emissiveTexture\":{",
+							"\t\t\t\t\"index\":0",
+							"\t\t\t},",
+							"\t\t\t\"name\":\"$(file_prefix)\",",
+							"\t\t\t\"normalTexture\":{",
+							"\t\t\t\t\"index\":1",
+							"\t\t\t},",
+							"\t\t\t\"occlusionTexture\":{",
+							"\t\t\t\t\"index\":2",
+							"\t\t\t},",
+							"\t\t\t\"pbrMetallicRoughness\":{",
+							"\t\t\t\t\"baseColorTexture\":{",
+							"\t\t\t\t\t\"index\":3",
+							"\t\t\t\t},",
+							"\t\t\t\t\"metallicRoughnessTexture\":{",
+							"\t\t\t\t\t\"index\":2",
+							"\t\t\t\t}",
+							"\t\t\t}",
+							"\t\t}",
+							"\t],",
+							"\t\"meshes\":[",
+							"\t\t{",
+							"\t\t\t\"name\":\"Plane\",",
+							"\t\t\t\"primitives\":[",
+							"\t\t\t\t{",
+							"\t\t\t\t\t\"attributes\":{",
+							"\t\t\t\t\t\t\"POSITION\":0,",
+							"\t\t\t\t\t\t\"NORMAL\":1,",
+							"\t\t\t\t\t\t\"TEXCOORD_0\":2",
+							"\t\t\t\t\t},",
+							"\t\t\t\t\t\"indices\":3,",
+							"\t\t\t\t\t\"material\":0",
+							"\t\t\t\t}",
+							"\t\t\t]",
+							"\t\t}",
+							"\t],",
+							"\t\"textures\":[",
+							"\t\t{",
+							"\t\t\t\"sampler\":0,",
+							"\t\t\t\"source\":0",
+							"\t\t},",
+							"\t\t{",
+							"\t\t\t\"sampler\":0,",
+							"\t\t\t\"source\":1",
+							"\t\t},",
+							"\t\t{",
+							"\t\t\t\"sampler\":0,",
+							"\t\t\t\"source\":2",
+							"\t\t},",
+							"\t\t{",
+							"\t\t\t\"sampler\":0,",
+							"\t\t\t\"source\":3",
+							"\t\t}",
+							"\t],",
+							"\t\"images\":[",
+							"\t\t{",
+							"$if $(connected:emission_tex)",
+							"\t\t\t\"uri\":\"$(file_prefix)_emission.png\",",
+							"$else",
+							"\t\t\t\"bufferView\":4,",
+							"$fi",
+							"\t\t\t\"mimeType\":\"image/png\",",
+							"\t\t\t\"name\":\"emission\"",
+							"\t\t},",
+							"\t\t{",
+							"$if $(connected:normal_tex)",
+							"\t\t\t\"uri\":\"$(file_prefix)_normal.png\",",
+							"$else",
+							"\t\t\t\"bufferView\":5,",
+							"$fi",
+							"\t\t\t\"mimeType\":\"image/png\",",
+							"\t\t\t\"name\":\"normal\"",
+							"\t\t},",
+							"\t\t{",
+							"$if $(connected:ao_tex) or $(connected:roughness_tex) or $(connected:metallic_tex)",
+							"\t\t\t\"uri\":\"$(file_prefix)_orm.png\",",
+							"$else",
+							"\t\t\t\"bufferView\":6,",
+							"$fi",
+							"\t\t\t\"mimeType\":\"image/png\",",
+							"\t\t\t\"name\":\"orm\"",
+							"\t\t},",
+							"\t\t{",
+							"$if $(connected:albedo_tex)",
+							"\t\t\t\"uri\":\"$(file_prefix)_albedo.png\",",
+							"$else",
+							"\t\t\t\"bufferView\":7,",
+							"$fi",
+							"\t\t\t\"mimeType\":\"image/png\",",
+							"\t\t\t\"name\":\"albedo\"",
+							"\t\t}",
+							"\t],",
+							"\t\"accessors\":[",
+							"\t\t{",
+							"\t\t\t\"bufferView\":0,",
+							"\t\t\t\"componentType\":5126,",
+							"\t\t\t\"count\":4,",
+							"\t\t\t\"max\":[",
+							"\t\t\t\t2,",
+							"\t\t\t\t0,",
+							"\t\t\t\t2",
+							"\t\t\t],",
+							"\t\t\t\"min\":[",
+							"\t\t\t\t-2,",
+							"\t\t\t\t0,",
+							"\t\t\t\t-2",
+							"\t\t\t],",
+							"\t\t\t\"type\":\"VEC3\"",
+							"\t\t},",
+							"\t\t{",
+							"\t\t\t\"bufferView\":1,",
+							"\t\t\t\"componentType\":5126,",
+							"\t\t\t\"count\":4,",
+							"\t\t\t\"type\":\"VEC3\"",
+							"\t\t},",
+							"\t\t{",
+							"\t\t\t\"bufferView\":2,",
+							"\t\t\t\"componentType\":5126,",
+							"\t\t\t\"count\":4,",
+							"\t\t\t\"type\":\"VEC2\"",
+							"\t\t},",
+							"\t\t{",
+							"\t\t\t\"bufferView\":3,",
+							"\t\t\t\"componentType\":5123,",
+							"\t\t\t\"count\":6,",
+							"\t\t\t\"type\":\"SCALAR\"",
+							"\t\t}",
+							"\t],",
+							"\t\"bufferViews\":[",
+							"\t\t{",
+							"\t\t\t\"buffer\":0,",
+							"\t\t\t\"byteLength\":48,",
+							"\t\t\t\"byteOffset\":0,",
+							"\t\t\t\"target\":34962",
+							"\t\t},",
+							"\t\t{",
+							"\t\t\t\"buffer\":0,",
+							"\t\t\t\"byteLength\":48,",
+							"\t\t\t\"byteOffset\":48,",
+							"\t\t\t\"target\":34962",
+							"\t\t},",
+							"\t\t{",
+							"\t\t\t\"buffer\":0,",
+							"\t\t\t\"byteLength\":32,",
+							"\t\t\t\"byteOffset\":96,",
+							"\t\t\t\"target\":34962",
+							"\t\t},",
+							"\t\t{",
+							"\t\t\t\"buffer\":0,",
+							"\t\t\t\"byteLength\":12,",
+							"\t\t\t\"byteOffset\":128,",
+							"\t\t\t\"target\":34963",
+							"\t\t},",
+							"\t\t{",
+							"\t\t\t\"buffer\":0,",
+							"\t\t\t\"byteLength\":83,",
+							"\t\t\t\"byteOffset\":140",
+							"\t\t},",
+							"\t\t{",
+							"\t\t\t\"buffer\":0,",
+							"\t\t\t\"byteLength\":83,",
+							"\t\t\t\"byteOffset\":224",
+							"\t\t},",
+							"\t\t{",
+							"\t\t\t\"buffer\":0,",
+							"\t\t\t\"byteLength\":83,",
+							"\t\t\t\"byteOffset\":308",
+							"\t\t},",
+							"\t\t{",
+							"\t\t\t\"buffer\":0,",
+							"\t\t\t\"byteLength\":83,",
+							"\t\t\t\"byteOffset\":392",
+							"\t\t}",
+							"\t],",
+							"\t\"samplers\":[",
+							"\t\t{",
+							"\t\t\t\"magFilter\":9729,",
+							"\t\t\t\"minFilter\":9987",
+							"\t\t}",
+							"\t],",
+							"\t\"buffers\":[",
+							"\t\t{",
+							"\t\t\t\"byteLength\":476,",
+							"\t\t\t\"uri\":\"data:application/octet-stream;base64,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\"",
+							"\t\t}",
+							"\t]",
+							"}",
+							""
+						],
+						"type": "template"
+					}
+				]
+			},
 			"Godot/Godot 3 Spatial": {
 				"export_extension": "tres",
 				"files": [