1 files changed, 58 insertions, 0 deletions
diff --git a/client/src/render/shaders/vertex_world_skin.wgsl b/client/src/render/shaders/vertex_world_skin.wgsl
new file mode 100644
index 0000000..6e2b308
--- /dev/null
+++ b/client/src/render/shaders/vertex_world_skin.wgsl
@@ -0,0 +1,58 @@
+//    wearechat - generic multiplayer game with voip
+//    Copyright (C) 2025 metamuffin
+//
+//    This program is free software: you can redistribute it and/or modify
+//    it under the terms of the GNU Affero General Public License as published by
+//    the Free Software Foundation, version 3 of the License only.
+//
+//    This program is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//    GNU Affero General Public License for more details.
+//
+//    You should have received a copy of the GNU Affero General Public License
+//    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+struct VertexIn {
+    @location(0) position: vec3<f32>,
+    @location(1) normal: vec3<f32>,
+    @location(2) tangent: vec3<f32>, // TODO maybe compress this
+    @location(3) texcoord: vec2<f32>,
+    @location(4) joint_index: vec4<u32>,
+    @location(5) joint_weight: vec4<f32>,
+}
+struct VertexOut {
+    @builtin(position) clip: vec4<f32>,
+    @location(0) normal: vec3<f32>,
+    @location(1) tangent: vec3<f32>,
+    @location(2) texcoord: vec2<f32>,
+    @location(3) position: vec3<f32>,
+}
+
+struct PushConst {
+    modelviewproject: mat4x4<f32>,
+    model: mat4x4<f32>,
+}
+
+@group(3) @binding(0) var<uniform> joints: array<mat4x4<f32>, 128>;
+var<push_constant>                 pc: PushConst;
+
+@vertex
+fn main(vi: VertexIn) -> VertexOut {
+    let pos_in = vec4(vi.position, 1.);
+    let j0 = vi.joint_weight.x * (joints[vi.joint_index.x] * pos_in);
+    let j1 = vi.joint_weight.y * (joints[vi.joint_index.y] * pos_in);
+    let j2 = vi.joint_weight.z * (joints[vi.joint_index.z] * pos_in);
+    let j3 = vi.joint_weight.w * (joints[vi.joint_index.w] * pos_in);
+    let position = j0 + j1 + j2 + j3;
+
+    let clip = pc.modelviewproject * position;
+    let vo = VertexOut(
+        clip,
+        normalize((pc.model * vec4(vi.normal, 0.)).xyz),
+        normalize((pc.model * vec4(vi.tangent, 0.)).xyz),
+        vi.texcoord,
+        (pc.model * vec4(vi.position, 1.)).xyz,
+    );
+    return vo;
+}