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$ ^- t% F- }1 I3 [9 E- y, [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。$ s" R& Q+ A8 X. G( a
- importPackage (java.lang);
& B# F8 }: ^/ O; X* B( g - importPackage (java.awt);& n# F- H1 |4 |: c) a
5 {- f) {# |* j5 T9 ]7 n- include(Resources.id("mtrsteamloco:library/code/face.js"));6 z4 N2 r# i7 r- b+ {* b
- . H9 @6 z# ^- U+ ~3 y
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
! w w. w/ |5 B* o. [" E
& a& V8 C$ ^ p1 E( n- function getW(str, font) {0 s0 Q. \* f2 M9 m
- let frc = Resources.getFontRenderContext();4 R) x! N K& A6 {: \& i/ y
- bounds = font.getStringBounds(str, frc);
( Z/ O' e: `) i3 C8 j% w- g - return Math.ceil(bounds.getWidth());
1 I- o) q- Q$ S! u$ b1 y- r/ F - }" U. |5 |* w+ p2 N" T& m5 f
' Z" M" E1 } P3 [- da = (g) => {//底图绘制! w( {" p8 [: }
- g.setColor(Color.BLACK);9 ^5 P0 h5 `' K' e! p! X( a! `
- g.fillRect(0, 0, 400, 400);
; S- j; {$ `$ M4 B( Y( Z - }
3 k8 W( [6 c' M% H3 _: J$ B" b1 l" v
4 Y/ ~6 v( r/ K& r/ f- O- db = (g) => {//上层绘制
4 B/ f$ V o. \8 a1 c* r4 ]% G - g.setColor(Color.WHITE);
. f& ?9 B- F3 s0 ~: T) }' J3 t - g.fillRect(0, 0, 400, 400);
9 q1 s: B; ]2 e/ c8 `9 N- c - g.setColor(Color.RED);
/ }$ f7 H2 i9 i2 |6 @" ^ - g.setFont(font0);- a4 i, Y' i; }2 _" `
- let str = "晴纱是男娘";
9 a$ t$ z# k" a$ K- i. w - let ww = 400;& }: c7 W" w/ V( a9 D, u* r
- let w = getW(str, font0);) Z- ^. _$ g9 _* Z9 {
- g.drawString(str, ww / 2 - w / 2, 200);
6 P9 V, N& i* j$ H - }- F& O2 J; {( S' _! Y) A: }9 K
- 6 t- X) |! I( w. k/ ^' _* k) a
- const mat = new Matrices();
6 ^1 b4 f" _( g: q& |3 R - mat.translate(0, 0.5, 0);
$ F8 {" D. q- Q7 o2 b - 2 P* V" k; m' { p, ~
- function create(ctx, state, entity) {
9 w+ F0 Y# ]4 V1 }! M' M/ G - let info = {
: u1 E% n- b; Y - ctx: ctx," y" n+ o; [5 D8 v8 s
- isTrain: false,% G" @: x5 g& u S1 I
- matrices: [mat],) _+ A+ {* f& Z, T# _
- texture: [400, 400],8 j8 Q" H, X5 q) L3 @) }8 O
- model: {
5 V* i; }3 y5 I, P9 ?3 s - renderType: "light",
! l$ e3 V: b+ C1 z% ` - size: [1, 1],& l! O k# T9 q( }
- uvSize: [1, 1]/ Q( k2 ]! ?! t5 C) Z
- }
/ u2 u& U' r% K - }4 m/ g8 D6 Z% Q( \
- let f = new Face(info);
$ I6 Y+ D3 a0 [4 S - state.f = f;
+ W. }+ C. a# [# D$ b
& { B& J4 z* i" u, {: k- let t = f.texture;
* d& g, V9 J8 j# Q. \ m - let g = t.graphics;
; j/ g) b) F7 u# ^2 E8 j) V: u# H - state.running = true;
" ]: f ?# a0 N. E( b& ~4 J - let fps = 24;
6 R6 C- N4 } i: S - da(g);//绘制底图- J6 K, Q% p, t
- t.upload();: B( [3 P" A- K% N" z# v/ Y
- let k = 0;0 z% \; L1 K+ t5 K m o& G
- let ti = Date.now();
]; C8 K, N" A; t2 o8 c% _ - let rt = 0;
- K" ^8 m1 Q, u& y. l8 M - smooth = (k, v) => {// 平滑变化
R1 ], p8 g, O9 N2 q, @/ L - if (v > k) return k;
4 [/ p" ` `3 E8 ]/ Q6 W. D9 y+ L - if (k < 0) return 0;
# U" a' F) D! Y8 C! S" j - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
$ a, O; O \4 j' q - }
9 ?2 l8 p5 q8 n& T+ ] - run = () => {// 新线程
$ x/ ^/ e% B; R% L - let id = Thread.currentThread().getId();
! P' k4 I# ?% s8 C0 t - print("Thread start:" + id);" |. |" S9 ~# R: b! b- h
- while (state.running) {8 \& l8 l% x7 u) k( @9 K) [3 V
- try {1 C( V5 B* R; O
- k += (Date.now() - ti) / 1000 * 0.2;
g E9 k2 E" E1 }3 S. b) n9 K - ti = Date.now();) m. L: A: c6 W" K
- if (k > 1.5) {/ T4 t% y0 {3 n% e
- k = 0;
( k! h: G+ D1 {# n: e - }& O$ h) l) _4 ^3 q7 x9 r3 ^8 z0 z
- setComp(g, 1);1 a' \4 _! ~% z( k _
- da(g);! B. R( c, X; D" n6 J* y
- let kk = smooth(1, k);//平滑切换透明度: T4 V; a" G% p0 H$ g0 u; f
- setComp(g, kk);: q8 x2 _& ~6 j0 s, Y. @; w; ^) r% U
- db(g);
# {8 g# }3 _& u" x2 }: Q - t.upload();; F. h' y, X) `& A- {9 S h+ \# a) I
- ctx.setDebugInfo("rt" ,Date.now() - ti);
9 h; B: H9 b" g2 T - ctx.setDebugInfo("k", k);
" I- v+ m q7 y% u. l, S7 w - ctx.setDebugInfo("sm", kk);
* C2 T c* v; ^2 j4 y6 j. h - rt = Date.now() - ti;
- d% x% l1 `! U* |5 O S; f - Thread.sleep(ck(rt - 1000 / fps));3 n5 X1 U# n1 A' ^1 [6 s
- ctx.setDebugInfo("error", 0)
: K# v: Z, M' @9 n/ @2 e - } catch (e) {# N. f9 O& _: W
- ctx.setDebugInfo("error", e);
6 l6 K, S1 J$ {6 A+ m: X% x - }
. x/ @3 q+ J8 t: C% q4 z9 S. Y$ P - }
$ r. r( t7 \0 |( o7 m/ J- J - print("Thread end:" + id);+ S3 e* f" ^ k$ u7 a# f% |7 }
- }
# \: T2 o) l6 w) Z, y- d) n - let th = new Thread(run, "qiehuan");' w8 U: } s4 P/ n: q
- th.start();" Q" d$ u; U% o7 Q6 J" ^6 H
- }6 T# k* ?( h6 C/ w2 H% r0 ]
: Y6 ]6 Q. e' d! L% H- function render(ctx, state, entity) {
8 e6 {' Q1 i9 v# l - state.f.tick();
7 ~% k1 K# C7 O. w* e9 N5 _ Z - }
7 m9 d1 ?; z- v8 a% i/ C8 I% |
3 h" d6 R# a' U/ p- function dispose(ctx, state, entity) {
+ |1 j. H4 y- o' A* [0 a - print("Dispose");/ K; T1 V3 }. N3 a2 ?0 w2 y
- state.running = false; o) _8 X/ G: p! z7 H. w
- state.f.close();8 h/ o0 R% l, L4 l$ `4 @
- }& Z: r* ?. e( R E$ H- G
- j2 |2 d9 u+ b
- function setComp(g, value) {% i+ B1 t% E" ~3 t4 ~& X l$ E$ R
- g.setComposite(AlphaComposite.SrcOver.derive(value));9 ?) D- n, K$ `- I3 S* C& t* c
- }
复制代码 % m. r9 j1 R/ Q
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。
. K) I+ D9 H; o% B4 ]: K/ n2 O, H% Z2 Z
% b, ?9 Q5 Q. \' ~) ~$ O: q顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)' w) u, i( C7 f7 A" s6 U) r! \/ L/ Y1 ]
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