Assests and shader for fireplace particle example

data/shaders/particlefire/particle.vert

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+#version 450
+
+#extension GL_ARB_separate_shader_objects : enable
+#extension GL_ARB_shading_language_420pack : enable
+
+layout (location = 0) in vec4 inPos;
+layout (location = 1) in vec4 inColor;
+layout (location = 2) in float inAlpha;
+layout (location = 3) in float inSize;
+layout (location = 4) in float inRotation;
+layout (location = 5) in int inType;
+
+layout (location = 0) out vec4 outColor;
+layout (location = 1) out float outPointSize;
+layout (location = 2) out float outAlpha;
+layout (location = 3) out flat int outType;
+layout (location = 4) out float outRotation;
+
+layout (binding = 0) uniform UBO 
+{
+	mat4 projection;
+	mat4 modelview;
+	vec2 viewportDim;
+	float pointSize;
+} ubo;
+
+void main () 
+{
+	gl_PointSize = ubo.pointSize;
+	outColor = inColor;
+	outAlpha = inAlpha;
+	outType = inType;
+	outRotation = inRotation;
+	  
+	vec4 eyePos = ubo.modelview * vec4(inPos.xyz, 1.0);
+	vec4 projVoxel = ubo.projection * vec4(ubo.pointSize, ubo.pointSize, eyePos.z, eyePos.w);
+	vec2 projSize = ubo.viewportDim * projVoxel.xy / projVoxel.w;
+
+	outPointSize = inSize * 0.25 * (projSize.x + projSize.y);
+	
+	gl_PointSize = outPointSize;
+		
+	gl_Position = ubo.projection * ubo.modelview * vec4(inPos.xyz, 1.0);	
+	
+	float pointDist = (gl_Position.w == 0.0) ? 0.00001 : gl_Position.w;
+	float viewportAR = ubo.viewportDim.x / ubo.viewportDim.y;
+	
+	gl_PointSize = (((inSize * 2048.0 * viewportAR) / pointDist) * viewportAR);	
+	
+}