Vulcan Nightmare

Experimentally bringing up vulcan support

assets/shaders/m2_smoke.vert.glsl

@@ -0,0 +1,36 @@
+#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;
+    vec4 shadowParams;
+};
+
+layout(push_constant) uniform Push {
+    float screenHeight;
+} push;
+
+layout(location = 0) in vec3 aPos;
+layout(location = 1) in float aLifeRatio;
+layout(location = 2) in float aSize;
+layout(location = 3) in float aIsSpark;
+
+layout(location = 0) out float vLifeRatio;
+layout(location = 1) out float vIsSpark;
+
+void main() {
+    vec4 viewPos4 = view * vec4(aPos, 1.0);
+    float dist = -viewPos4.z;
+    float scale = aIsSpark > 0.5 ? 0.12 : 0.3;
+    gl_PointSize = clamp(aSize * scale * push.screenHeight / max(dist, 1.0), 1.0, 64.0);
+    vLifeRatio = aLifeRatio;
+    vIsSpark = aIsSpark;
+    gl_Position = projection * viewPos4;
+}