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Diffstat (limited to 'doc/classes/Projection.xml')
-rw-r--r-- | doc/classes/Projection.xml | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/doc/classes/Projection.xml b/doc/classes/Projection.xml index b8f6e54d87..602833bca5 100644 --- a/doc/classes/Projection.xml +++ b/doc/classes/Projection.xml @@ -1,8 +1,12 @@ <?xml version="1.0" encoding="UTF-8" ?> <class name="Projection" version="4.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../class.xsd"> <brief_description> + 3D projection (4x4 matrix). </brief_description> <description> + A 4x4 matrix used for 3D projective transformations. It can represent transformations such as translation, rotation, scaling, shearing, and perspective division. It consists of four [Vector4] columns. + For purely linear transformations (translation, rotation, and scale), it is recommended to use [Transform3D], as it is more performant and has a lower memory footprint. + Used internally as [Camera3D]'s projection matrix. </description> <tutorials> </tutorials> @@ -10,18 +14,31 @@ <constructor name="Projection"> <return type="Projection" /> <description> + Constructs a default-initialized [Projection] set to [constant IDENTITY]. </description> </constructor> <constructor name="Projection"> <return type="Projection" /> <param index="0" name="from" type="Projection" /> <description> + Constructs a [Projection] as a copy of the given [Projection]. </description> </constructor> <constructor name="Projection"> <return type="Projection" /> <param index="0" name="from" type="Transform3D" /> <description> + Constructs a Projection as a copy of the given [Transform3D]. + </description> + </constructor> + <constructor name="Projection"> + <return type="Projection" /> + <param index="0" name="x_axis" type="Vector4" /> + <param index="1" name="y_axis" type="Vector4" /> + <param index="2" name="z_axis" type="Vector4" /> + <param index="3" name="w_axis" type="Vector4" /> + <description> + Constructs a Projection from four [Vector4] values (matrix columns). </description> </constructor> </constructors> @@ -30,12 +47,14 @@ <return type="Projection" /> <param index="0" name="flip_y" type="bool" /> <description> + Creates a new [Projection] that projects positions from a depth range of [code]-1[/code] to [code]1[/code] to one that ranges from [code]0[/code] to [code]1[/code], and flips the projected positions vertically, according to [param flip_y]. </description> </method> <method name="create_fit_aabb" qualifiers="static"> <return type="Projection" /> <param index="0" name="aabb" type="AABB" /> <description> + Creates a new [Projection] that scales a given projection to fit around a given [AABB] in projection space. </description> </method> <method name="create_for_hmd" qualifiers="static"> @@ -49,6 +68,8 @@ <param index="6" name="z_near" type="float" /> <param index="7" name="z_far" type="float" /> <description> + Creates a new [Projection] for projecting positions onto a head-mounted display with the given X:Y aspect ratio, distance between eyes, display width, distance to lens, oversampling factor, and depth clipping planes. + [param eye] creates the projection for the left eye when set to 1, or the right eye when set to 2. </description> </method> <method name="create_frustum" qualifiers="static"> @@ -60,6 +81,7 @@ <param index="4" name="z_near" type="float" /> <param index="5" name="z_far" type="float" /> <description> + Creates a new [Projection] that projects positions in a frustum with the given clipping planes. </description> </method> <method name="create_frustum_aspect" qualifiers="static"> @@ -71,12 +93,15 @@ <param index="4" name="z_far" type="float" /> <param index="5" name="flip_fov" type="bool" default="false" /> <description> + Creates a new [Projection] that projects positions in a frustum with the given size, X:Y aspect ratio, offset, and clipping planes. + [param flip_fov] determines whether the projection's field of view is flipped over its diagonal. </description> </method> <method name="create_light_atlas_rect" qualifiers="static"> <return type="Projection" /> <param index="0" name="rect" type="Rect2" /> <description> + Creates a new [Projection] that projects positions into the given [Rect2]. </description> </method> <method name="create_orthogonal" qualifiers="static"> @@ -88,6 +113,7 @@ <param index="4" name="z_near" type="float" /> <param index="5" name="z_far" type="float" /> <description> + Creates a new [Projection] that projects positions using an orthogonal projection with the given clipping planes. </description> </method> <method name="create_orthogonal_aspect" qualifiers="static"> @@ -98,6 +124,8 @@ <param index="3" name="z_far" type="float" /> <param index="4" name="flip_fov" type="bool" default="false" /> <description> + Creates a new [Projection] that projects positions using an orthogonal projection with the given size, X:Y aspect ratio, and clipping planes. + [param flip_fov] determines whether the projection's field of view is flipped over its diagonal. </description> </method> <method name="create_perspective" qualifiers="static"> @@ -108,6 +136,8 @@ <param index="3" name="z_far" type="float" /> <param index="4" name="flip_fov" type="bool" default="false" /> <description> + Creates a new [Projection] that projects positions using a perspective projection with the given Y-axis field of view (in degrees), X:Y aspect ratio, and clipping planes. + [param flip_fov] determines whether the projection's field of view is flipped over its diagonal. </description> </method> <method name="create_perspective_hmd" qualifiers="static"> @@ -121,31 +151,40 @@ <param index="6" name="intraocular_dist" type="float" /> <param index="7" name=" convergence_dist" type="float" /> <description> + Creates a new [Projection] that projects positions using a perspective projection with the given Y-axis field of view (in degrees), X:Y aspect ratio, and clipping distances. The projection is adjusted for a head-mounted display with the given distance between eyes and distance to a point that can be focused on. + [param eye] creates the projection for the left eye when set to 1, or the right eye when set to 2. + [param flip_fov] determines whether the projection's field of view is flipped over its diagonal. </description> </method> <method name="determinant" qualifiers="const"> <return type="float" /> <description> + Returns a scalar value that is the signed factor by which areas are scaled by this matrix. If the sign is negative, the matrix flips the orientation of the area. + The determinant can be used to calculate the invertibility of a matrix or solve linear systems of equations involving the matrix, among other applications. </description> </method> <method name="flipped_y" qualifiers="const"> <return type="Projection" /> <description> + Returns a copy of this [Projection] with the signs of the values of the Y column flipped. </description> </method> <method name="get_aspect" qualifiers="const"> <return type="float" /> <description> + Returns the X:Y aspect ratio of this [Projection]'s viewport. </description> </method> <method name="get_far_plane_half_extents" qualifiers="const"> <return type="Vector2" /> <description> + Returns the dimensions of the far clipping plane of the projection, divided by two. </description> </method> <method name="get_fov" qualifiers="const"> <return type="float" /> <description> + Returns the horizontal field of view of the projection (in degrees). </description> </method> <method name="get_fovy" qualifiers="static"> @@ -153,89 +192,114 @@ <param index="0" name="fovx" type="float" /> <param index="1" name="aspect" type="float" /> <description> + Returns the vertical field of view of the projection (in degrees) associated with the given horizontal field of view (in degrees) and aspect ratio. </description> </method> <method name="get_lod_multiplier" qualifiers="const"> <return type="float" /> <description> + Returns the factor by which the visible level of detail is scaled by this [Projection]. </description> </method> <method name="get_pixels_per_meter" qualifiers="const"> <return type="int" /> <param index="0" name="for_pixel_width" type="int" /> <description> + Returns the number of pixels with the given pixel width displayed per meter, after this [Projection] is applied. </description> </method> <method name="get_projection_plane" qualifiers="const"> <return type="Plane" /> <param index="0" name="plane" type="int" /> <description> + Returns the clipping plane of this [Projection] whose index is given by [param plane]. + [param plane] should be equal to one of [constant PLANE_NEAR], [constant PLANE_FAR], [constant PLANE_LEFT], [constant PLANE_TOP], [constant PLANE_RIGHT], or [constant PLANE_BOTTOM]. </description> </method> <method name="get_viewport_half_extents" qualifiers="const"> <return type="Vector2" /> <description> + Returns the dimensions of the viewport plane that this [Projection] projects positions onto, divided by two. </description> </method> <method name="get_z_far" qualifiers="const"> <return type="float" /> <description> + Returns the distance for this [Projection] beyond which positions are clipped. </description> </method> <method name="get_z_near" qualifiers="const"> <return type="float" /> <description> + Returns the distance for this [Projection] before which positions are clipped. </description> </method> <method name="inverse" qualifiers="const"> <return type="Projection" /> <description> + Returns a [Projection] that performs the inverse of this [Projection]'s projective transformation. </description> </method> <method name="is_orthogonal" qualifiers="const"> <return type="bool" /> <description> + Returns [code]true[/code] if this [Projection] performs an orthogonal projection. </description> </method> <method name="jitter_offseted" qualifiers="const"> <return type="Projection" /> <param index="0" name="offset" type="Vector2" /> <description> + Returns a [Projection] with the X and Y values from the given [Vector2] added to the first and second values of the final column respectively. </description> </method> <method name="perspective_znear_adjusted" qualifiers="const"> <return type="Projection" /> <param index="0" name="new_znear" type="float" /> <description> + Returns a [Projection] with the near clipping distance adjusted to be [param new_znear]. + [b]Note:[/b] The original [Projection] must be a perspective projection. </description> </method> </methods> <members> <member name="w" type="Vector4" setter="" getter="" default="Vector4(0, 0, 0, 1)"> + The projection matrix's W vector (column 3). Equivalent to array index [code]3[/code]. </member> <member name="x" type="Vector4" setter="" getter="" default="Vector4(1, 0, 0, 0)"> + The projection matrix's X vector (column 0). Equivalent to array index [code]0[/code]. </member> <member name="y" type="Vector4" setter="" getter="" default="Vector4(0, 1, 0, 0)"> + The projection matrix's Y vector (column 1). Equivalent to array index [code]1[/code]. </member> <member name="z" type="Vector4" setter="" getter="" default="Vector4(0, 0, 1, 0)"> + The projection matrix's Z vector (column 2). Equivalent to array index [code]2[/code]. </member> </members> <constants> <constant name="PLANE_NEAR" value="0"> + The index value of the projection's near clipping plane. </constant> <constant name="PLANE_FAR" value="1"> + The index value of the projection's far clipping plane. </constant> <constant name="PLANE_LEFT" value="2"> + The index value of the projection's left clipping plane. </constant> <constant name="PLANE_TOP" value="3"> + The index value of the projection's top clipping plane. </constant> <constant name="PLANE_RIGHT" value="4"> + The index value of the projection's right clipping plane. </constant> <constant name="PLANE_BOTTOM" value="5"> + The index value of the projection bottom clipping plane. </constant> <constant name="IDENTITY" value="Projection(1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1)"> + A [Projection] with no transformation defined. When applied to other data structures, no transformation is performed. </constant> <constant name="ZERO" value="Projection(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0)"> + A [Projection] with all values initialized to 0. When applied to other data structures, they will be zeroed. </constant> </constants> <operators> @@ -243,30 +307,38 @@ <return type="bool" /> <param index="0" name="right" type="Projection" /> <description> + Returns [code]true[/code] if the projections are not equal. + [b]Note:[/b] Due to floating-point precision errors, this may return [code]true[/code], even if the projections are virtually equal. An [code]is_equal_approx[/code] method may be added in a future version of Godot. </description> </operator> <operator name="operator *"> <return type="Projection" /> <param index="0" name="right" type="Projection" /> <description> + Returns a [Projection] that applies the combined transformations of this [Projection] and [param right]. </description> </operator> <operator name="operator *"> <return type="Vector4" /> <param index="0" name="right" type="Vector4" /> <description> + Projects (multiplies) the given [Vector4] by this [Projection] matrix. </description> </operator> <operator name="operator =="> <return type="bool" /> <param index="0" name="right" type="Projection" /> <description> + Returns [code]true[/code] if the projections are equal. + [b]Note:[/b] Due to floating-point precision errors, this may return [code]false[/code], even if the projections are virtually equal. An [code]is_equal_approx[/code] method may be added in a future version of Godot. </description> </operator> <operator name="operator []"> <return type="Vector4" /> <param index="0" name="index" type="int" /> <description> + Returns the column of the [Projection] with the given index. + Indices are in the following order: x, y, z, w. </description> </operator> </operators> |