anki-3d-engine/programs/ForwardShadingParticles.ankiprog

<!-- 
Copyright (C) 2009-2018, Panagiotis Christopoulos Charitos and contributors.
All rights reserved.
Code licensed under the BSD License.
http://www.anki3d.org/LICENSE
-->
<shaderProgram>
	<descriptorSet index="1"/>

	<mutators>
		<mutator name="ANIMATED_TEXTURE" values="0 1"/>
		<mutator name="LIGHT" values="0 1"/>
	</mutators>

	<shaders>
		<shader type="vert">
			<inputs>
				<input name="mvp" type="mat4"/>
				<input name="cameraRotMat" type="mat3"/>
			</inputs>

			<source><![CDATA[
#include "shaders/ForwardShadingCommonVert.glsl"

layout(location = SCALE_LOCATION) in float in_scale;
layout(location = ALPHA_LOCATION) in float in_alpha;

layout(location = 0) flat out float out_alpha;
layout(location = 1) out vec2 out_uv;
layout(location = 2) out vec3 out_worldPos;

void main() 
{
	out_uv = vec2(gl_VertexID & 1, gl_VertexID >> 1);

	out_worldPos = cameraRotMat * vec3((out_uv - 0.5) * in_scale, 0.0) + in_position;
	gl_Position = mvp * vec4(out_worldPos, 1.0);

	out_alpha = in_alpha;
}
			]]>
			</source>
		</shader>

		<shader type="frag">
			<inputs>
				<input name="diffuseMap" type="sampler2D">
					<mutators>
						<mutator name="ANIMATED_TEXTURE" values="0"/>
					</mutators>
				</input>
				<input name="diffuseMapArr" type="sampler2DArray">
					<mutators>
						<mutator name="ANIMATED_TEXTURE" values="1"/>
					</mutators>
				</input>
				<input name="animationPeriod" type="float" const="1">
					<mutators>
						<mutator name="ANIMATED_TEXTURE" values="1"/>
					</mutators>
				</input>
				<input name="colorScale" type="vec4" const="1"/>
				<input name="colorBias" type="vec4" const="1"/>
			</inputs>

			<source><![CDATA[
#include "shaders/ForwardShadingCommonFrag.glsl"

layout(location = 0) flat in float in_alpha;
layout(location = 1) in vec2 in_uv;
layout(location = 2) in vec3 in_worldPos;

void main() 
{
#if ANIMATED_TEXTURE == 1
	vec4 texCol = readAnimatedTextureRgba(diffuseMapArr, animationPeriod, in_uv, anki_u_time);
#else
	vec4 texCol = texture(diffuseMap, in_uv);
#endif

#if LIGHT
	texCol.rgb = computeLightColor(texCol.rgb, in_worldPos);
#endif
	
	vec4 colScale = colorScale;
	colScale.a *= in_alpha;
	particleAlpha(texCol, colScale, colorBias);
}
			]]>
			</source>
		</shader>
	</shaders>
</shaderProgram>