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7 W& B" K) ` W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。, A. V, {, O* A# D/ Y, x: j5 H
- importPackage (java.lang);
2 N7 x+ H3 g/ v/ l7 ^/ i! i' W - importPackage (java.awt);
/ |4 e X+ U# s# t7 M5 i
1 t: t# g+ D/ K9 N- include(Resources.id("mtrsteamloco:library/code/face.js"));8 S3 }* V L1 C
' }0 P- e% \0 H6 f- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);( K8 n8 S) U; j
, a8 I: Q7 ^: X; ^4 r, p$ T" d6 [- function getW(str, font) {
9 i4 T: h( P4 H4 Q, i7 H( M* j2 B0 t3 K - let frc = Resources.getFontRenderContext();
$ I A" E$ m+ S! b - bounds = font.getStringBounds(str, frc);1 @6 G2 A: w3 Z- G( ^
- return Math.ceil(bounds.getWidth());
' B, d& O4 @* ~2 H. s k7 N - }2 V% a7 X5 I; t5 J; P
6 U/ t+ Y! ]0 {. ~" w* x2 K- da = (g) => {//底图绘制9 \$ g: h5 a/ o1 O, W3 r5 b' w
- g.setColor(Color.BLACK);
+ r7 O$ F7 y/ x" S2 g( L7 N - g.fillRect(0, 0, 400, 400);- A7 ~/ b: C* E! q0 ~. G/ e4 G& X6 N
- }
+ B" l6 S5 S+ [) P3 k0 |$ O - " A7 d [# ~/ ~1 E+ P7 y
- db = (g) => {//上层绘制. {, a, K3 n. c+ t9 r
- g.setColor(Color.WHITE);
2 ^# J8 ^; o: L2 a - g.fillRect(0, 0, 400, 400);* ?/ i5 F# N% y) m3 j" _
- g.setColor(Color.RED);4 ^8 l- [6 p6 d
- g.setFont(font0);
8 S7 U7 j- X0 z9 M$ x$ A G - let str = "晴纱是男娘";) m' k0 q- N& k0 r% a
- let ww = 400;7 s5 C: o4 d' l; K
- let w = getW(str, font0);3 m& i; D2 P$ C& l5 ]3 u& ~
- g.drawString(str, ww / 2 - w / 2, 200);% K8 _4 r9 P5 n I
- }
* R7 U9 u+ X& }) ?5 f - 0 }) K6 t& u) A/ O, p; n% O
- const mat = new Matrices();
. y5 J# E, m0 A' ?( A9 C4 } - mat.translate(0, 0.5, 0);; F$ i& }! g) ]1 C; i
- 7 s4 d7 ~* C0 o$ J* ]
- function create(ctx, state, entity) {
( U e( r/ z4 p5 W - let info = {
/ Y2 T2 u0 T" T$ [7 o - ctx: ctx,
5 j, l# B+ S% U* c - isTrain: false,5 O8 O0 _# K) ~$ p8 \7 u
- matrices: [mat],
S5 Q4 S9 {' r - texture: [400, 400],
$ ^' G4 t6 M; G - model: {
' J K$ ` _0 p# O- R' r' c4 b - renderType: "light",
+ c9 x, o' V" [' Y - size: [1, 1],
' z& D; K& r$ l0 X9 V6 ?5 s: Z - uvSize: [1, 1]
3 ^, y4 h! W" c; ?0 P - }
4 r# p) Y, I( [: v. \5 v+ ~) a - }
0 [+ k7 J; a+ {- _; B8 L: g - let f = new Face(info);
- D1 t" \. o# ]+ y* @% x - state.f = f;
% i, Z4 ]; h3 a* e - # B& @+ o7 j0 z5 R1 F8 X2 m: C
- let t = f.texture;
: Y8 m% M3 j7 N W Y$ A - let g = t.graphics;
. U6 m* D; J! y3 q4 ^, ] - state.running = true;
" H: M2 N/ `) m2 c& @% l - let fps = 24;
' F" f T) L$ m1 a - da(g);//绘制底图 b+ c- W' C( z; n; F- M
- t.upload();! a( H& R; P; z- n7 a
- let k = 0;, k3 Q1 }" ~+ ~9 m/ k) G" @5 m
- let ti = Date.now();0 Y J: r: e! O7 L2 Y
- let rt = 0;
8 X t! g5 A8 b6 d" V1 D. s - smooth = (k, v) => {// 平滑变化
3 c( S* H3 s! o, `1 G1 Z5 o) t - if (v > k) return k;
: R: ?9 H7 ^8 v$ w3 j5 }* o$ j ~ - if (k < 0) return 0;3 m' q* ]9 _! T* a3 K% u
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
1 H {; O0 Z7 a# F - }% T" S! T$ `/ A) K
- run = () => {// 新线程+ Y9 \7 B X. _0 Y
- let id = Thread.currentThread().getId();. w) [! f8 k4 p' `" g' m
- print("Thread start:" + id);
N( O- j6 j& S/ ^& j: n% A! ? - while (state.running) {
9 Q; Y+ }2 p0 Y$ E" ~! R - try {/ y: V) G+ F! J5 S F' X* u
- k += (Date.now() - ti) / 1000 * 0.2;9 K& _( q9 |# x
- ti = Date.now();# D% q4 R# f& E' C d9 w
- if (k > 1.5) {8 x5 ]# b6 w, D; Q
- k = 0;
8 T$ {$ j' e. N# Y8 y$ K# ^' n5 @ - }
: W- ~/ C: j C6 ^1 T - setComp(g, 1);
5 n% Q2 ]9 } B - da(g);
6 K3 | G7 ?& W/ T6 x9 E2 k - let kk = smooth(1, k);//平滑切换透明度. h/ z( q, l' F1 ~# s1 E, g8 \8 {& P
- setComp(g, kk);3 u& @: H1 y; x% _, A: z
- db(g);/ z- K; ]# v& t- g% F7 n/ J
- t.upload();" Y- `$ C+ g+ i1 N
- ctx.setDebugInfo("rt" ,Date.now() - ti);; p& k8 Y/ U6 v3 K' x1 y7 f0 ^# d
- ctx.setDebugInfo("k", k);2 c& N0 R+ M4 n9 x
- ctx.setDebugInfo("sm", kk);& t4 ]' q. t) t3 r3 s
- rt = Date.now() - ti;
c* q. p/ u) y# n% J+ B - Thread.sleep(ck(rt - 1000 / fps));- z0 p. r% u5 J. G i
- ctx.setDebugInfo("error", 0); }* O7 L: n( _ s
- } catch (e) {
" i8 z% u1 P0 p8 j7 P/ t - ctx.setDebugInfo("error", e);
. L! s( y+ k1 Q( e, N) R: ~ - }
% H2 P' C1 P+ _ E- _; W - }; O" a: g9 l. T2 ]
- print("Thread end:" + id);6 u2 ?! j2 n. u7 A- X6 O1 |; v$ _
- }
1 `7 B) g. R7 t8 _ - let th = new Thread(run, "qiehuan");
$ \/ V, R- B) b - th.start();# U' Y& k/ l' f, c- [
- }
! e0 K/ `% _" q - ! i4 c# G" b" u: K2 Y( u
- function render(ctx, state, entity) {
# o' `) C3 v1 Z4 x - state.f.tick();# y% m' X& _1 ]' {8 z3 g
- }
9 u% E" |# i( L% a5 V# ]1 h9 v9 U8 E - / ?7 Y; T, }& t) O# U
- function dispose(ctx, state, entity) {
2 s# p& T a5 p - print("Dispose");3 x: f/ w! W" p. f9 H$ e+ _* B
- state.running = false;& a9 {! F; Q$ A0 C1 ?8 }
- state.f.close();
2 M# C3 f& E. G5 o - }3 w( ]( N/ V0 k! `3 P3 ?
" ]( C' r9 z6 p# n) ^- function setComp(g, value) {
4 p, k: `3 D& j8 K! [, ` - g.setComposite(AlphaComposite.SrcOver.derive(value));
. H) K9 s6 L% ?; b, @0 H - }
复制代码 & E, a1 R, w# u1 Y
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。- Z' a' z% e7 S+ F4 }# l
- \- c7 C0 C- I- z
; g) x3 v+ v! b5 F$ C顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)" a7 Y, F% K% x( l5 b b _
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