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* t5 C5 L. J; W7 T' B6 c7 x% c4 N这些天想了想怎么给LCD做丝滑的动画,稍微想了想,便有了下面这些代码。
+ x; O7 @! t& ?. E$ h+ b- importPackage (java.lang);
8 W, L3 A" R( s4 n' w - importPackage (java.awt);
8 c& L- m) W% Y r3 ^ - c+ v# ]: D8 X4 y3 p2 @1 e, F
- include(Resources.id("mtrsteamloco:library/code/face.js"));0 X) |/ L$ H w0 R- F' l
2 w& l; ~2 i1 B5 q [- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);# Y* D" d2 A0 o- G$ ]
- 1 h& [$ o F5 m! t F8 e3 N
- function getW(str, font) {7 q( M- g4 F+ m+ ?
- let frc = Resources.getFontRenderContext();* Z8 T* s4 L: s1 ]" s) i
- bounds = font.getStringBounds(str, frc);7 A9 r( O0 |& t# W, |
- return Math.ceil(bounds.getWidth());% f5 |. T! |; S
- }( ]. b$ e8 x: b" o1 I0 v
8 a, a' i' T; X( C, \- da = (g) => {//底图绘制6 [; k* D" g$ j3 L/ \
- g.setColor(Color.BLACK);+ ]3 W$ \5 `. N% G5 F; T* `
- g.fillRect(0, 0, 400, 400);. Z! r% v' b; D. D, ~4 T( ~
- }
/ a" ]8 g* Z3 a! ?4 c' x
; p b5 \. g* v6 D9 b6 M; c, L, O- db = (g) => {//上层绘制
( ]3 S- A) r& K# I: n - g.setColor(Color.WHITE);
) \8 L0 Z4 K; Y* M4 P8 S# G8 q - g.fillRect(0, 0, 400, 400);
% X0 @! q8 A: ` - g.setColor(Color.RED);
6 Y. Y- Z$ N& v; D - g.setFont(font0);6 ]3 G8 V2 t3 X' H* W$ ^
- let str = "晴纱是男娘";, `+ P# e/ k0 p# V
- let ww = 400;! [8 F2 s8 W+ r9 e' z4 Z% i
- let w = getW(str, font0);
( ~/ M; t/ h& S1 b( x/ V - g.drawString(str, ww / 2 - w / 2, 200);2 n3 w W1 A1 U( V& _. X' F+ o
- }0 M; V E" o, p8 e
% M' ]* ~+ {) q9 L- O3 P- const mat = new Matrices();
5 l: b2 ?9 b. Z3 k/ \ E8 Q - mat.translate(0, 0.5, 0);( O E2 q) S; x* m
- ! h. t4 F, f; H' ~* w
- function create(ctx, state, entity) {9 g& m a; z+ ?* o
- let info = {7 k: W8 K/ o: {- \/ C
- ctx: ctx,; U2 \4 G8 R5 X1 X+ l* i
- isTrain: false,6 q' Z+ \" c( X1 `
- matrices: [mat],
" F2 @3 i* J8 ?& d8 j - texture: [400, 400],
7 u. s# `, D3 p; w - model: {
# X/ k7 W) P7 E$ K8 z - renderType: "light",
1 u7 P" R9 I: j2 P4 y; A - size: [1, 1],
3 ?: p3 c( E9 d7 ] - uvSize: [1, 1]2 |3 _. A& }; j/ Q e/ D6 w& R2 A$ w
- }+ o: t( `7 ~( _' d& P: E3 _3 R
- }; c4 U" z' o- }: f% z
- let f = new Face(info);" W6 h5 M, U' [2 D
- state.f = f;: ] d0 j |- S; n7 i& n
- " |+ U2 j' F. Q* l# K3 e
- let t = f.texture;. s6 `" n& o: @$ P' L) `( W5 T1 q3 }
- let g = t.graphics; A9 |+ ^( V7 }& f* _8 l
- state.running = true;( O) \9 ?$ d; D5 [1 L
- let fps = 24;- I/ o: u+ I& R; F D# Q+ a; z' q6 F
- da(g);//绘制底图
" P+ N, T% D2 t! J6 H - t.upload();
! f( @5 o2 h+ V+ w - let k = 0;
! H+ l6 I- I& Y2 ^1 a - let ti = Date.now();; N5 P) m5 d% [% |5 [
- let rt = 0;
0 q9 q n& c% u% ?; q: J& p: V - smooth = (k, v) => {// 平滑变化
4 j" ~( W8 M7 J6 l - if (v > k) return k;. {6 w/ ]3 D3 c7 D
- if (k < 0) return 0;2 v2 B: K1 |& Y' ^. G
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;6 R7 t0 W; d' z. f4 s8 q* ~* V
- }
: @' f0 Q i' _ - run = () => {// 新线程/ c* [* p2 F3 N( `$ U
- let id = Thread.currentThread().getId();/ ?- _- a, F3 H
- print("Thread start:" + id);- C, [; f3 ?; o) C' Y
- while (state.running) {
7 h) P! _- C6 w- l. ~9 \' v - try { D% c" m; e# C" {7 D4 M
- k += (Date.now() - ti) / 1000 * 0.2; S* V- b7 [' F. T) U
- ti = Date.now();2 r0 Q2 N q' |( f) `
- if (k > 1.5) {
2 |/ m# ?% a5 e# T) U# S& H ]2 y - k = 0;
4 k8 l6 f# H8 k$ O% u! S5 l7 b - }- p7 e2 u+ [0 Q! S
- setComp(g, 1);# K+ }- I5 r A: C5 I6 R+ r+ B4 C
- da(g);
; d3 N, G2 m7 R* G I8 l2 S - let kk = smooth(1, k);//平滑切换透明度
. ]$ O2 N8 B z% q" v, ] - setComp(g, kk);4 z# ]! r- ^- O- q8 s7 c
- db(g);% m/ [& }, _! P v! L9 X
- t.upload();* z/ x3 O7 t% |& F; p1 b, h
- ctx.setDebugInfo("rt" ,Date.now() - ti);6 |3 S8 g$ J: r+ N0 o7 e* @1 q
- ctx.setDebugInfo("k", k);' k2 s6 m; r& T
- ctx.setDebugInfo("sm", kk);. {# `7 E8 m% m" p$ y
- rt = Date.now() - ti;
# W" @. R. E7 \+ t - Thread.sleep(ck(rt - 1000 / fps));8 H! n l3 ~9 m' r% {2 r# @
- ctx.setDebugInfo("error", 0)
2 @+ V+ U1 q$ i8 h$ Z8 J - } catch (e) {
?/ {+ ?- X$ j9 _& D - ctx.setDebugInfo("error", e);% ^4 Z' F; Z. ^! b6 z t
- }
9 U5 h1 \9 e+ [1 W6 }, ~1 c - }& z. {$ f# ^8 q% S6 e1 `
- print("Thread end:" + id);
- v V) B5 [1 h1 r) S! A' g - }, j' @% v( Z6 f6 ]. C1 c+ R2 g* n
- let th = new Thread(run, "qiehuan");! X6 L( Z+ T( @0 f0 y6 D& j
- th.start();! {9 V2 o+ ]) n# O4 @, S- T; j4 ]9 F
- }0 W) c z: e' I" E4 d9 g# B
# M8 _, ?# q3 e' D# P! n+ ~+ B# f1 L+ k- function render(ctx, state, entity) {6 Y- f% Q2 |; ~ t$ G. q( `
- state.f.tick();/ d* P. m, c% v' a! R9 H y6 B- D
- }
; D |: ~9 I0 ?; i& @, s- }0 c
# b B; s4 F" y. O; {3 [: S# r! H- function dispose(ctx, state, entity) {5 j) e9 \$ ~2 P7 `% B9 t
- print("Dispose");
U K! B8 w, Y9 p1 Y - state.running = false;
+ c$ e& v8 o# s9 Z6 Q( k - state.f.close();
% o! L# ~( Y" q$ R - }2 g" J' U1 R3 x7 v+ C( ?. @4 T
' [0 ~) ^& d; z6 x$ M- function setComp(g, value) {) |( Q) p& O. O% Z3 q
- g.setComposite(AlphaComposite.SrcOver.derive(value));% b& J3 j/ k* N
- }
复制代码
, {8 E% x4 @2 F写了这么久的js,我便渐渐发觉使用 render 来写更新内容有局限性,比如说会拉高延迟.....等等(但可能也没什么影响?)。在这里我用新建 Thread (线程) 然后在新的 Thread 里来处理图片更新逻辑,实现丝滑切换。
$ a) L. e0 k8 i' W" {0 y
& V" P8 E' k6 Y
# N$ r+ ^ i6 u- u顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)4 Y6 Q; U, Z0 d+ Q7 _; Z, s* i3 j
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