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Diffstat (limited to 'doc/lua_api.txt')
| -rw-r--r-- | doc/lua_api.txt | 189 |
1 files changed, 3 insertions, 186 deletions
diff --git a/doc/lua_api.txt b/doc/lua_api.txt index 3b3f17634..7d552c980 100644 --- a/doc/lua_api.txt +++ b/doc/lua_api.txt @@ -414,119 +414,6 @@ the word "`alpha`", then each texture pixel will contain the RGB of `<color>` and the alpha of `<color>` multiplied by the alpha of the texture pixel. -Particle blend --------------- -Blend function is defined by integer number. -There is a huge number of acceptable blend modificators. -Colour of a resulting pixel calculated using formulae: - - red = source_red * source_factor + destination_red * destination_factor - -and so on for every channel. - -Here is a some examples: - -Default value: - - material_type_param = 0, - -Use this value to disable blending. Texture will be applied to existing pixels -using alpha channel of it. Its recomended to use 1-bit alpha -in that case. This value will leave z-buffer writeable. - -Additive blend: - - material_type_param = 12641, - -Source = src_alpha, destination = one, alpha source is a texture and -vertex_color, modulate_1x. -Black color is completely transparent, white color is completely opaque. -Alpha channel still used to calculate result color, but not nessesary. -'destination = one' means that resulting color will be calculated using -overwritten pixels values. -For example with color of source (our texture) RGBA = (0,192,255,63) -"blue-cyan", 1/4 opaque. -and already rendered pixel color (40,192,0) "dark lime green" we will get color: - -R = source_red(0) * source_factor(src_alpha=63/255) + - destination_red(40) * destination_factor(one) = - 0 * 63/255 + 40 * 1 = 40 - -G = 192 * 63/255 + 192 * 1 = 239 -B = 255 * 63/255 + 0 * 1 = 63 - -Result: (40,239,63), "green" (a kind of). -Note, if you made a texture with some kind of shape with colour 662211h -it will appear dark red with a single particle, then yellow with a -several of them and white if player looking thru a lot of them. With -this you could made a nice-looking fire. - -Substractive blend: - - material_type_param = 12548, - -Source = zero, destination = src_color, alpha source is a texture and -vertex_color, modulate_1x. -Texture darkness act like an alpha channel. -Black color is completely opaque, white color is completely transparent. -'destination = src_color' means that destination in multiplied by -a source values. 'source = zero' means that source values ignored -(multiplied by 0). - -Invert blend: - - material_type_param = 12597, - -Source = one_minus_dst_color, destination = one_minus_src_alpha, alpha source -is a texture and vertex_color, modulate_1x. -Pixels invert color if source color value is big enough. If not, they just -black. -'destination = one_minus_src_alpha' means, that effect is masked by a -source alpha channel. - -You can design and use your own blend using those enum values and function -'minetest.pack_texture_blend_func'. Returned value of a function is -your 'material_type_param'. - -A values in a brackets is a multiplicators of a red, green, blue -and alpha channels respectively. - -* 'minetest.ebf': global table, containing blend factor enum values. Such as: - * zero = 0 -- src & dest (0, 0, 0, 0) - * one = 1 -- src & dest (1, 1, 1, 1) - * dst_color = 2 -- src (destR, destG, destB, destA) - * one_minus_dst_color = 3 -- src (1-destR, 1-destG, 1-destB, 1-destA) - * src_color = 4 -- dest (srcR, srcG, srcB, srcA) - * one_minus_src_color = 5 -- dest (1-srcR, 1-srcG, 1-srcB, 1-srcA) - * src_alpha = 6 -- src & dest (srcA, srcA, srcA, srcA) - * one_minus_src_alpha = 7 -- src & dest (1-srcA, 1-srcA, 1-srcA, 1-srcA) - * dst_alpha = 8 -- src & dest (destA, destA, destA, destA) - * one_minus_dst_alpha = 9 -- src & dest (1-destA, 1-destA, 1-destA, 1-destA) - * src_alpha_saturate = 10 -- src (min(srcA, 1-destA), idem, ...) - -* 'minetest.emfn': global table, containing modulate enum values. - * Multiply the components of the arguments, and shift the products to the - * left by x bits for brightening. Contain: - * modulate_1x = 1 -- no bit shift - * modulate_2x = 2 -- 1 bits shift - * modulate_4x = 4 -- 2 bits shift - -'modulate_4x' is quite useful when you want to make additive blend stronger -with a lower amount of particles. - -* 'minetest.eas': global table, containing alpha source enum values. Such as: - * none = 0 -- do not use alpha. - * vertex_color = 1 -- use vertex color alpha. - * texture = 2 -- use texture alpha. - -You can use both 'vertex_color' and 'texture' source by using value 3. - -* 'minetest.pack_texture_blend_func(srcFact, dstFact, modulate, alphaSource)': return integer - * Pack texture blend funcion variable. Depending from that variable blend - * function will be applied in time of a render poligons with selected material. - * Therefore resulting pixel will be 'source * srcFact + destination * dstFact' - * Use result of this function as 'material_type_param'. - Sounds ------ Only Ogg Vorbis files are supported. @@ -3763,7 +3650,7 @@ Definition tables ### Tile definition * `"image.png"` -* `{name="image.png", animation={Animation definition}}` +* `{name="image.png", animation={Tile Animation definition}}` * `{name="image.png", backface_culling=bool, tileable_vertical=bool, tileable_horizontal=bool}` * backface culling enabled by default for most nodes @@ -3774,50 +3661,8 @@ Definition tables * deprecated, yet still supported field names: * `image` (name) -### Animation definition - -#### Node animation, particle and particle spawners -* `{ type="vertical_frames", - aspect_w=16, - -- ^ specify width of a picture in pixels. - aspect_h=16, - -- ^ specify height of a frame in pixels. - length=3.0 - -- ^ specify full loop length. - first_frame = 0, -- <- only for particles, use - min_first_frame = 0, -- <- for particle spawners - max_first_frame = 0, - loop_animation = true, -- <- only for particles and particle spawners - -- specify if animation should start from beginning after last frame. -}` - -#### Particle and particle spawners only -* `{ - type="2d_animation_sheet", -- <- only for particles and particle spawners - vertical_frame_num = 1, - horizontal_frame_num = 1, - -- ^ specify amount of frames in texture. - -- Can be used both for animation or for texture transform - -- together with first_frame variable. - -- A animation texture separated on equal parts of frames, - -- by horizontal and vertical numbers. For example with - -- vertical_frame_num = 4 and horizontal_frame_num = 3 we got - -- 4*3 = 12 frames in total. Animation sequence start from - -- left top frame and go on to the right until reach end of - -- row. Next row also start from left frame. - first_frame = 0, -- <- only for particles, use - min_first_frame = 0, -- <- for particle spawners - max_first_frame = 0, - -- ^ specify first frame to start animation. - frame_length = -1, - -- ^ specify length of a frame in seconds. Negative and zero values - -- disable animation. A sequence with vertical_frame_num = 4 and - -- horizontal_frame_num = 3, first_frame = 4 and frame_length = 0.1 - -- will end in (4*3-4)*0.1 = 0.8 seconds. - loop_animation = true, - -- specify if animation should start from beginning after last frame. -}` - * All settings are optional. Default values is located in this example. +### Tile animation definition +* `{type="vertical_frames", aspect_w=16, aspect_h=16, length=3.0}` ### Node definition (`register_node`) @@ -4272,20 +4117,6 @@ The Biome API is still in an experimental phase and subject to change. -- ^ Uses texture (string) playername = "singleplayer" -- ^ optional, if specified spawns particle only on the player's client - material_type_param = 12641, - -- ^ optional, if specified spawns particle with - -- specified material type param and disable z-buffer. - -- Some examples: - -- Default value: 0, - -- Additive blend: 12641, - -- Substractive blend: 12548, - -- Invert blend: 12597, - -- See also "Particle blend". - animation = {Animation definition}, - -- ^ see above. Note, that particle and particle spawners have differences. - glow = 15, - -- ^ optional, specify particle self-luminescence in darkness. - values may vary from 0 (no glow) to 15 (bright glow). } ### `ParticleSpawner` definition (`add_particlespawner`) @@ -4320,20 +4151,6 @@ The Biome API is still in an experimental phase and subject to change. -- ^ Uses texture (string) playername = "singleplayer" -- ^ Playername is optional, if specified spawns particle only on the player's client - material_type_param = 12641, - -- ^ optional, if specified spawns particle with specified material type - -- param and disable z-buffer. - -- Some examples: - -- Default value: 0, - -- Additive blend: 12641, - -- Substractive blend: 12548, - -- Invert blend: 12597, - -- See also "Particle blend". - animation = {Animation definition}, - -- ^ see above. Note, that particle and particle spawners have differences. - glow = 15, - -- ^ optional, specify particle self-luminescence in darkness. - values may vary from 0 (no glow) to 15 (bright glow). } ### `HTTPRequest` definition (`HTTPApiTable.fetch_async`, `HTTPApiTable.fetch_async`) |