anki-3d-engine/AnKi/Shaders/ForwardShadingFog.ankiprog

// Copyright (C) 2009-2022, Panagiotis Christopoulos Charitos and contributors.
// All rights reserved.
// Code licensed under the BSD License.
// http://www.anki3d.org/LICENSE

#pragma anki mutator ANKI_TECHNIQUE 3

#include <AnKi/Shaders/ForwardShadingCommon.glsl>

struct PerDraw
{
	Mat3x4 m_ankiTransform;
	ANKI_RP Vec3 m_fogColor;
	ANKI_RP F32 m_fogAlphaScale;
	ANKI_RP F32 m_fogDistanceOfMaxThikness;
};

#pragma anki reflect AnKiLocalUniforms
#pragma anki struct AnKiLocalUniforms
#pragma anki member ANKI_RP Vec3 m_fogColor
#pragma anki member ANKI_RP F32 m_fogAlphaScale
#pragma anki member ANKI_RP F32 m_fogDistanceOfMaxThikness
#pragma anki struct end

layout(set = MATERIAL_SET_GLOBAL, binding = MATERIAL_BINDING_GLOBAL_UNIFORMS) uniform b_ankiGlobalUniforms
{
	MaterialGlobalUniforms u_global;
};

layout(set = MATERIAL_SET_LOCAL, binding = MATERIAL_BINDING_RENDERABLE_GPU_VIEW) uniform b_renderableGpuViews
{
	RenderableGpuView u_renderableGpuViews[1];
};

layout(set = MATERIAL_SET_LOCAL, binding = MATERIAL_BINDING_LOCAL_UNIFORMS, std430) buffer b_localUniforms
{
	U32 u_localUniforms[];
};

#pragma anki start vert

layout(location = 0) out F32 out_zVSpace;

void main()
{
	const Vec3 worldPos = u_renderableGpuViews[0].m_worldTransform * Vec4(in_position, 1.0);

	gl_Position = u_global.m_viewProjectionMatrix * Vec4(worldPos, 1.0);

	const Vec3 viewPos = u_global.m_viewMatrix * Vec4(worldPos, 1.0);
	out_zVSpace = viewPos.z;
}

#pragma anki end

#pragma anki start frag

layout(location = 0) in F32 in_zVSpace;

void main()
{
	const AnKiLocalUniforms localUniforms = loadAnKiLocalUniforms(u_localUniforms, 0u);

	fog(localUniforms.m_fogColor, localUniforms.m_fogAlphaScale, localUniforms.m_fogDistanceOfMaxThikness, in_zVSpace);
}
#pragma anki end