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Document MatrixStack (#2794)

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mappings/net/minecraft/client/util/math/MatrixStack.mapping
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CLASS net/minecraft/class_4587 net/minecraft/client/util/math/MatrixStack
COMMENT A stack of transformation matrices used to specify how things are
COMMENT {@linkplain #translate translated}, {@linkplain #scale scaled} or
COMMENT {@linkplain #multiply rotated} in 3D space. Each entry consists of a
COMMENT {@linkplain Entry#getPositionMatrix position matrix} and a {@linkplain
COMMENT Entry#getNormalMatrix normal matrix}.
COMMENT
COMMENT <p>By putting matrices in a stack, a transformation can be expressed
COMMENT relative to another. You can {@linkplain #push push}, transform, render
COMMENT and {@linkplain #pop pop}, which allows you to restore the original
COMMENT state after rendering.
COMMENT
COMMENT <p>An entry of identity matrix is pushed when a stack is created. This
COMMENT means that a stack is {@linkplain #isEmpty empty} if and only if the
COMMENT stack contains exactly one entry.
FIELD field_20898 stack Ljava/util/Deque;
METHOD method_22903 push ()V
COMMENT Pushes a copy of the top entry onto this stack.
METHOD method_22904 translate (DDD)V
COMMENT Applies the translation transformation to the top entry.
ARG 1 x
ARG 3 y
ARG 5 z
METHOD method_22905 scale (FFF)V
COMMENT Applies the scale transformation to the top entry.
ARG 1 x
ARG 2 y
ARG 3 z
METHOD method_22907 multiply (Lnet/minecraft/class_1158;)V
COMMENT Applies the rotation transformation to the top entry.
ARG 1 quaternion
METHOD method_22908 (Ljava/util/ArrayDeque;)V
ARG 0 stack
METHOD method_22909 pop ()V
COMMENT Removes the entry at the top of this stack.
METHOD method_22911 isEmpty ()Z
COMMENT {@return whether this stack contains exactly one entry}
METHOD method_23760 peek ()Lnet/minecraft/class_4587$class_4665;
COMMENT {@return the entry at the top of this stack}
METHOD method_34425 multiplyPositionMatrix (Lnet/minecraft/class_1159;)V
COMMENT Multiplies the top position matrix with the given matrix.
ARG 1 matrix
METHOD method_34426 loadIdentity ()V
COMMENT Sets the top entry to be the identity matrix.
CLASS class_4665 Entry
FIELD field_21327 positionMatrix Lnet/minecraft/class_1159;
FIELD field_21328 normalMatrix Lnet/minecraft/class_4581;
METHOD <init> (Lnet/minecraft/class_1159;Lnet/minecraft/class_4581;)V
ARG 1 positionMatrix
ARG 2 normalMatrix
METHOD method_23761 getPositionMatrix ()Lnet/minecraft/class_1159;
COMMENT {@return the matrix used to transform positions}
METHOD method_23762 getNormalMatrix ()Lnet/minecraft/class_4581;
COMMENT {@return the normal matrix}