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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。8 T, ~3 j; ] s4 U! F! Z) ]6 i& _
- importPackage (java.lang);* v6 ^% _, O- `+ h
- importPackage (java.awt);
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* D9 k. k5 R" @* S! v1 z- include(Resources.id("mtrsteamloco:library/code/face.js"));( z2 h. W& l( I, v) v& G1 k6 H: b
- % x5 ?, D' U- F) f
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);/ h4 Q+ w6 D+ t0 e2 d
- % E* [3 f1 F8 ^! _7 |1 F1 W
- function getW(str, font) {8 {7 H" T/ v4 o( |
- let frc = Resources.getFontRenderContext();) Q! c9 E2 q3 h3 H/ N
- bounds = font.getStringBounds(str, frc);, L6 `( t' e! e2 }# E/ y0 N
- return Math.ceil(bounds.getWidth());( Z9 W7 U6 t& y5 [8 q2 T
- }
% t5 B2 x# W K4 h% ~" L1 w - . @! C0 R3 [4 C1 m, `! p* r
- da = (g) => {//底图绘制7 o4 Y: ^( Z4 E) @# F P8 z7 X
- g.setColor(Color.BLACK);
" w7 {( I0 }8 E2 g! f - g.fillRect(0, 0, 400, 400);
+ Z+ H) ^: `& p$ t: a G9 F9 W; ^ - }7 ?2 m0 F+ ~$ z0 Y d+ C: J4 V* w k
- ; t5 A& t; _/ @+ q4 Y2 F
- db = (g) => {//上层绘制0 d9 J" |) j, N. T
- g.setColor(Color.WHITE);6 ~1 s1 Q5 u, S; Q
- g.fillRect(0, 0, 400, 400);; b( w! Y" y# m/ @8 I$ T8 r& r
- g.setColor(Color.RED);2 Q- h9 O. k" o7 W
- g.setFont(font0);9 ^) r) k# x& g4 C
- let str = "晴纱是男娘";* E0 a4 y1 `3 e; n7 l
- let ww = 400;2 Q l- Z% l1 Q/ _
- let w = getW(str, font0);
3 H8 k4 u' g: }( y - g.drawString(str, ww / 2 - w / 2, 200);" x+ E2 V7 |0 }8 u" o7 N
- }
+ w! J0 A, K2 h, [ - ( O1 x: Z0 g" D" I
- const mat = new Matrices();
+ v+ X2 d2 k' B3 V8 s$ ^! ^* U - mat.translate(0, 0.5, 0);# ]: N0 l# r5 Z7 t# v6 m
5 d; J, e5 s! v$ c6 B- function create(ctx, state, entity) {
: h" x+ P) d' ~: p* a" A - let info = {
% K9 R1 l# o$ W% _6 j: _ - ctx: ctx,/ D* y/ f' V4 I$ T3 g! F) u+ Y( K. m
- isTrain: false,8 P+ t* ^) v b$ J u
- matrices: [mat],8 z8 s/ H' O& U n) Q
- texture: [400, 400],
' l2 t6 f/ K) d6 d* v" ] - model: {
% I0 t5 t" i8 x0 N8 f" k - renderType: "light",
; o. s$ J# B2 O6 m7 D3 U6 V ~ - size: [1, 1]," W1 P/ Z' r8 X/ H
- uvSize: [1, 1]0 B8 F3 e! z4 d/ R$ M. O5 N
- }
& Z ~; f- P$ P5 f3 W - }
# I, ]: q7 b- N - let f = new Face(info);
1 ^+ E/ U8 _. E1 r% [ - state.f = f;4 ~1 Y2 `$ n/ O2 X- _: }+ J
- ' I1 \* I; j% C4 Y2 q2 N
- let t = f.texture;
) w, H$ S8 S7 I# K7 n9 { - let g = t.graphics;4 F$ t) l( l1 p
- state.running = true;: d l& C v: I
- let fps = 24;
6 o+ O5 n0 G% j/ m; H - da(g);//绘制底图' U; z; K6 B& a3 R0 @
- t.upload();
4 p! ~9 L ?3 Y1 r/ j - let k = 0;
; }/ O, N; y8 L. u4 }$ y - let ti = Date.now();+ |$ `; V! Y1 n
- let rt = 0;3 g$ q1 `3 X2 p( j) |& A. A2 M# ^
- smooth = (k, v) => {// 平滑变化
% u5 M8 ~& _/ N/ m8 u' n - if (v > k) return k;, H# p4 O3 q6 f: a
- if (k < 0) return 0;+ B$ Q9 L0 n4 |+ Z9 u
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
. o) G( L( r3 F% H, K4 h - }- ]7 S2 n6 L: R* S
- run = () => {// 新线程: ~+ R" [# W. a( x
- let id = Thread.currentThread().getId();
4 {: `/ Q) l/ t* u0 X ?& W" ] - print("Thread start:" + id);
. Y0 p! P$ o! `) J% u8 b - while (state.running) {; g" I" d3 r" C
- try {
) v8 R# X- U6 U - k += (Date.now() - ti) / 1000 * 0.2;
. n( i% X* N$ ?) q+ _2 a - ti = Date.now();+ G/ t, k" d, Z8 z' `8 s- x4 |
- if (k > 1.5) {
% D( k) r. a( C - k = 0;
! d& i4 }# x; X. S7 W0 c - }
* F- ?# Q5 V; `/ w9 { - setComp(g, 1);
+ D9 {+ j/ _0 ]- }- h - da(g);) l4 B9 _) l4 j4 {$ `, T$ e1 ^
- let kk = smooth(1, k);//平滑切换透明度# t" \& t! c1 @% p" g2 H7 \# N, v
- setComp(g, kk);- ] a* Z0 Y. \: \
- db(g);
5 t. ^8 ?; h3 M - t.upload();
. S1 X! a2 k% x& F" F - ctx.setDebugInfo("rt" ,Date.now() - ti);
% |% |: j2 S! k% `- ] t2 M - ctx.setDebugInfo("k", k);. R3 F8 j4 |9 B' i+ S
- ctx.setDebugInfo("sm", kk);
8 x0 o8 L) [/ l4 R# y - rt = Date.now() - ti;% X6 @; L9 x! `2 ?( z# W
- Thread.sleep(ck(rt - 1000 / fps));; Z# M" F& e9 p# D1 X- Q2 U
- ctx.setDebugInfo("error", 0)
# b8 Z# S" N9 u - } catch (e) {+ z! O3 I; U% R5 F
- ctx.setDebugInfo("error", e);
" b, v) y4 J Q$ k4 n - }
% S% T+ O) \9 O4 J - }
0 R) {& L3 i: k - print("Thread end:" + id);$ k7 Y) c7 `1 w6 ?
- }" L7 @- P4 K# R% _
- let th = new Thread(run, "qiehuan");
. R- e& D! l& q8 Q9 O6 J" V - th.start();
* S Z! N7 q% i - }
9 ]1 l1 V0 j. B - , p6 J9 X! x! h+ |. Y& w
- function render(ctx, state, entity) {5 `: V! f& l: S. j8 b. ^
- state.f.tick();
. p6 e" G! H: G, ] - }
- }% t) L; Z7 `2 t* d$ w. e - 6 V2 m) d9 j3 z2 k% [3 Q
- function dispose(ctx, state, entity) {
H0 I' d' y* j, M u- b - print("Dispose");
$ q! G1 m: k: m/ A0 z; B1 m - state.running = false;3 u, k, c( [, i! t8 Z' g
- state.f.close();' D5 U! X7 s0 s6 j# `
- }
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- function setComp(g, value) {
, h0 J. \3 v1 w3 W5 s3 P - g.setComposite(AlphaComposite.SrcOver.derive(value));
) ~! x' S8 Q2 C9 ~4 q5 j - }
复制代码 + R- a' k4 h+ [: E! z" i
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。
/ s4 W; |! c+ X d9 p+ f q: H9 W2 `" t4 n6 G, h5 [4 }$ k0 l) A
. W0 L# @9 P. w4 v1 C a& E, t' J2 e顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)7 V7 B: ~) u8 E, d% d
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