// Copyright (C) 2002-2012 Nikolaus Gebhardt
// This file is part of the "Irrlicht Engine".
// For conditions of distribution and use, see copyright notice in irrlicht.h

#ifndef __E_MATERIAL_TYPES_H_INCLUDED__
#define __E_MATERIAL_TYPES_H_INCLUDED__

namespace irr
{
namespace video
{

	//! Abstracted and easy to use fixed function/programmable pipeline material modes.
	enum E_MATERIAL_TYPE
	{
		//! Standard solid material.
		/** Only first texture is used, which is supposed to be the
		diffuse material. */
		EMT_SOLID = 0,

		//! Solid material with 2 texture layers.
		/** The second is blended onto the first using the alpha value
		of the vertex colors. This material is currently not implemented in OpenGL.
		*/
		EMT_SOLID_2_LAYER,

		//! Material type with standard lightmap technique
		/** There should be 2 textures: The first texture layer is a
		diffuse map, the second is a light map. Dynamic light is
		ignored. */
		EMT_LIGHTMAP,

		//! Material type with lightmap technique like EMT_LIGHTMAP.
		/** But lightmap and diffuse texture are added instead of modulated. */
		EMT_LIGHTMAP_ADD,

		//! Material type with standard lightmap technique
		/** There should be 2 textures: The first texture layer is a
		diffuse map, the second is a light map. Dynamic light is
		ignored. The texture colors are effectively multiplied by 2
		for brightening. Like known in DirectX as D3DTOP_MODULATE2X. */
		EMT_LIGHTMAP_M2,

		//! Material type with standard lightmap technique
		/** There should be 2 textures: The first texture layer is a
		diffuse map, the second is a light map. Dynamic light is
		ignored. The texture colors are effectively multiplied by 4
		for brightening. Like known in DirectX as D3DTOP_MODULATE4X. */
		EMT_LIGHTMAP_M4,

		//! Like EMT_LIGHTMAP, but also supports dynamic lighting.
		EMT_LIGHTMAP_LIGHTING,

		//! Like EMT_LIGHTMAP_M2, but also supports dynamic lighting.
		EMT_LIGHTMAP_LIGHTING_M2,

		//! Like EMT_LIGHTMAP_M4, but also supports dynamic lighting.
		EMT_LIGHTMAP_LIGHTING_M4,

		//! Detail mapped material.
		/** The first texture is diffuse color map, the second is added
		to this and usually displayed with a bigger scale value so that
		it adds more detail. The detail map is added to the diffuse map
		using ADD_SIGNED, so that it is possible to add and subtract
		color from the diffuse map. For example a value of
		(127,127,127) will not change the appearance of the diffuse map
		at all. Often used for terrain rendering. */
		EMT_DETAIL_MAP,

		//! Look like a reflection of the environment around it.
		/** To make this possible, a texture called 'sphere map' is
		used, which must be set as the first texture. */
		EMT_SPHERE_MAP,

		//! A reflecting material with an optional non reflecting texture layer.
		/** The reflection map should be set as first texture. */
		EMT_REFLECTION_2_LAYER,

		//! A transparent material.
		/** Only the first texture is used. The new color is calculated
		by simply adding the source color and the dest color. This
		means if for example a billboard using a texture with black
		background and a red circle on it is drawn with this material,
		the result is that only the red circle will be drawn a little
		bit transparent, and everything which was black is 100%
		transparent and not visible. This material type is useful for
		particle effects. */
		EMT_TRANSPARENT_ADD_COLOR,

		//! Makes the material transparent based on the texture alpha channel.
		/** The final color is blended together from the destination
		color and the texture color, using the alpha channel value as
		blend factor. Only first texture is used. If you are using
		this material with small textures, it is a good idea to load
		the texture in 32 bit mode
		(video::IVideoDriver::setTextureCreationFlag()). Also, an alpha
		ref is used, which can be manipulated using
		SMaterial::MaterialTypeParam. This value controls how sharp the
		edges become when going from a transparent to a solid spot on
		the texture. */
		EMT_TRANSPARENT_ALPHA_CHANNEL,

		//! Makes the material transparent based on the texture alpha channel.
		/** If the alpha channel value is greater than 127, a
		pixel is written to the target, otherwise not. This
		material does not use alpha blending and is a lot faster
		than EMT_TRANSPARENT_ALPHA_CHANNEL. It is ideal for drawing
		stuff like leaves of plants, because the borders are not
		blurry but sharp. Only first texture is used. If you are
		using this material with small textures and 3d object, it
		is a good idea to load the texture in 32 bit mode
		(video::IVideoDriver::setTextureCreationFlag()). */
		EMT_TRANSPARENT_ALPHA_CHANNEL_REF,

		//! Makes the material transparent based on the vertex alpha value.
		EMT_TRANSPARENT_VERTEX_ALPHA,

		//! A transparent reflecting material with an optional additional non reflecting texture layer.
		/** The reflection map should be set as first texture. The
		transparency depends on the alpha value in the vertex colors. A
		texture which will not reflect can be set as second texture.*/
		EMT_TRANSPARENT_REFLECTION_2_LAYER,

		//! BlendFunc = source * sourceFactor + dest * destFactor ( E_BLEND_FUNC )
		/** Using only first texture. Generic blending method. 
		The blend function is set to SMaterial::MaterialTypeParam with 
		pack_textureBlendFunc (for 2D) or pack_textureBlendFuncSeparate (for 3D). */
		EMT_ONETEXTURE_BLEND,

		//! This value is not used. It only forces this enumeration to compile to 32 bit.
		EMT_FORCE_32BIT = 0x7fffffff
	};

	//! Array holding the built in material type names
	const char* const sBuiltInMaterialTypeNames[] =
	{
		"solid",
		"solid_2layer",
		"lightmap",
		"lightmap_add",
		"lightmap_m2",
		"lightmap_m4",
		"lightmap_light",
		"lightmap_light_m2",
		"lightmap_light_m4",
		"detail_map",
		"sphere_map",
		"reflection_2layer",
		"trans_add",
		"trans_alphach",
		"trans_alphach_ref",
		"trans_vertex_alpha",
		"trans_reflection_2layer",
		"onetexture_blend",
		0
	};

} // end namespace video
} // end namespace irr


#endif // __E_MATERIAL_TYPES_H_INCLUDED__

