Vulcan Nightmare

Experimentally bringing up vulcan support

assets/shaders/skybox.vert.glsl

@@ -0,0 +1,27 @@
+#version 450
+
+layout(set = 0, binding = 0) uniform PerFrame {
+    mat4 view;
+    mat4 projection;
+    mat4 lightSpaceMatrix;
+    vec4 lightDir;
+    vec4 lightColor;
+    vec4 ambientColor;
+    vec4 viewPos;
+    vec4 fogColor;
+    vec4 fogParams; // x=fogStart, y=fogEnd, z=time
+    vec4 shadowParams; // x=enabled, y=strength
+};
+
+layout(location = 0) in vec3 aPos;
+
+layout(location = 0) out vec3 WorldPos;
+layout(location = 1) out float Altitude;
+
+void main() {
+    WorldPos = aPos;
+    Altitude = aPos.y;
+    mat4 rotView = mat4(mat3(view)); // strip translation
+    vec4 pos = projection * rotView * vec4(aPos, 1.0);
+    gl_Position = pos.xyww; // force far plane
+}