Babylon.js/materialsLibrary/materials/fire/fire.vertex.fx

precision highp float;

// Attributes
attribute vec3 position;
#ifdef UV1
attribute vec2 uv;
#endif
#ifdef UV2
attribute vec2 uv2;
#endif
#ifdef VERTEXCOLOR
attribute vec4 color;
#endif

#include<bonesDeclaration>

// Uniforms
#include<instancesDeclaration>

uniform mat4 view;
uniform mat4 viewProjection;

#ifdef DIFFUSE
varying vec2 vDiffuseUV;
#endif

#ifdef POINTSIZE
uniform float pointSize;
#endif

// Output
varying vec3 vPositionW;

#ifdef VERTEXCOLOR
varying vec4 vColor;
#endif

#include<clipPlaneVertexDeclaration>

#include<fogVertexDeclaration>
#include<shadowsVertexDeclaration>

// Fire
uniform float time;
uniform float speed;

#ifdef DIFFUSE
varying vec2 vDistortionCoords1;
varying vec2 vDistortionCoords2;
varying vec2 vDistortionCoords3;
#endif

void main(void) {

#include<instancesVertex>
#include<bonesVertex>

	gl_Position = viewProjection * finalWorld * vec4(position, 1.0);

	vec4 worldPos = finalWorld * vec4(position, 1.0);
	vPositionW = vec3(worldPos);

	// Texture coordinates
#ifdef DIFFUSE
	vDiffuseUV = uv;
	vDiffuseUV.y -= 0.2;
#endif

	// Clip plane
#include<clipPlaneVertex>

	// Fog
#include<fogVertex>

	// Vertex color
#ifdef VERTEXCOLOR
	vColor = color;
#endif

	// Point size
#ifdef POINTSIZE
	gl_PointSize = pointSize;
#endif

#ifdef DIFFUSE
	// Fire
	vec3 layerSpeed = vec3(-0.2, -0.52, -0.1) * speed;
	
	vDistortionCoords1.x = uv.x;
	vDistortionCoords1.y = uv.y + layerSpeed.x * time / 1000.0;
	
	vDistortionCoords2.x = uv.x;
	vDistortionCoords2.y = uv.y + layerSpeed.y * time / 1000.0;
	
	vDistortionCoords3.x = uv.x;
	vDistortionCoords3.y = uv.y + layerSpeed.z * time / 1000.0;
#endif
}