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0 ^: B% _3 Y4 l& ?) W) q% O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% g) p! q" t. p! R- importPackage (java.lang);9 N/ H6 p2 D- N+ d7 {" U
- importPackage (java.awt);7 @$ q$ K$ z+ H) |* H
# ]' e4 w# G3 }1 |" U- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- T0 A5 V9 B, r0 O0 \% A- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);% |3 A2 U: m; l5 a8 ]
- , N0 y3 A+ l7 j+ B& h& F
- function getW(str, font) { N; {, K2 E2 c5 G$ G7 N
- let frc = Resources.getFontRenderContext();
" W0 L$ B4 q1 F0 z+ ?% t - bounds = font.getStringBounds(str, frc);! A: q- B+ I6 j! s0 m% S
- return Math.ceil(bounds.getWidth());
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; |6 @) X7 h1 a0 a& I- da = (g) => {//底图绘制
) d4 X c7 Q% u. r/ ^# v& k - g.setColor(Color.BLACK);: W. F8 W' V# M; _3 y2 O
- g.fillRect(0, 0, 400, 400);
6 }6 N& b. Z& v9 t A - }/ y' W5 a6 i# r# O6 F" T
6 P/ G- t3 q( Z- db = (g) => {//上层绘制7 Z6 M9 L! E- ]. n
- g.setColor(Color.WHITE);+ b& s, U+ ~. o3 K1 [
- g.fillRect(0, 0, 400, 400);3 _& P% Y, N; [8 w
- g.setColor(Color.RED);/ d2 V9 A8 _; ]$ ?
- g.setFont(font0);3 U' g; V9 Q* h* }3 ]
- let str = "晴纱是男娘";+ O I. C& S5 `! X2 m3 r1 v
- let ww = 400;
. \1 y0 e% V0 a0 `, _, R7 z - let w = getW(str, font0);
) F: q% d9 O, @9 P2 r - g.drawString(str, ww / 2 - w / 2, 200);
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- const mat = new Matrices();% c1 e. n( q6 W' B
- mat.translate(0, 0.5, 0);7 B% y) f v! s! ~" I$ s9 I
; {1 b4 V% N: ^2 M% K9 ]- function create(ctx, state, entity) {
. Q: b2 `$ d; {, t - let info = {0 G3 S3 ~ j) Z# h5 |( Q
- ctx: ctx,
0 V8 G5 R3 l8 x - isTrain: false,6 s+ Y4 A; H# ?% U& m4 r4 z8 H
- matrices: [mat],
: S" U! s. r f3 u2 D - texture: [400, 400],
R, ^* u$ _) m& p3 G- O8 p - model: {' N: B( g1 A! K& d. C P
- renderType: "light",
1 e" \2 L1 ?/ g; Y8 J' f4 P% v/ \ - size: [1, 1],- p l' j# a2 M) R) w# w
- uvSize: [1, 1]2 \: x7 U2 N+ z( r
- }$ J# D/ `) R8 w' U1 ~) c
- }2 @/ j! G( L5 Q/ n: ]3 q! n
- let f = new Face(info);2 i* |! n7 V$ I4 b& g$ n
- state.f = f;9 W3 `! h+ R( P/ k% ]* i
- ' ^2 i1 L" ~( d2 K8 A
- let t = f.texture;
' m" Y L# ?' h, t0 A - let g = t.graphics;
y q) S: N+ B/ s - state.running = true;( b W7 l |% V0 _6 S
- let fps = 24;
2 ?6 R/ }3 _* U9 S; t# o+ c - da(g);//绘制底图
; k# x" M4 p6 z# @. @/ d - t.upload();9 ~+ B2 @3 `: i5 |1 k7 \4 m+ ?- Q# f
- let k = 0;1 R2 l& s7 h( @) O$ n: b0 a2 }7 ]
- let ti = Date.now();( Q" L5 i3 H( M
- let rt = 0;
1 o) j! j+ S. ?2 e/ S& U5 D+ G7 \ - smooth = (k, v) => {// 平滑变化& Z! K) k Q! i$ C7 w2 C
- if (v > k) return k;$ f9 { ^5 P2 b. j1 J
- if (k < 0) return 0;4 e$ n% A: \* u+ k1 r0 ~3 u) D
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
2 W7 E! b' f% y d5 V0 N - }
2 Q9 C8 d5 v8 b1 H0 e - run = () => {// 新线程' R7 X% h+ x( R
- let id = Thread.currentThread().getId();
+ |- C# U1 s6 n" t, i - print("Thread start:" + id);
4 O5 g% e4 A5 q0 u6 }' @3 U - while (state.running) {
5 J3 M% m* x8 F+ H: j: }# ~" l* k - try {
5 `/ C$ h6 s% Z' C/ U/ z% }5 l - k += (Date.now() - ti) / 1000 * 0.2;6 }) z+ j' _0 L9 v# p% s
- ti = Date.now();4 e+ J# k% g4 L& A; V0 ~
- if (k > 1.5) {
" K$ X: k/ K( b; z+ X4 [ - k = 0;) \& x+ j b' D2 L% d
- }% ^( O+ Q9 L1 x0 A3 @3 ^
- setComp(g, 1);6 z2 ]0 g( `' E( N0 k
- da(g);
8 E! F! ^2 [" i/ g& C2 _ - let kk = smooth(1, k);//平滑切换透明度
# m- c2 G) I. I - setComp(g, kk);
& p. L/ q3 Q, _$ p - db(g);
! [6 u- h$ w8 v! |0 g/ S9 N% v7 t3 O - t.upload();
' z0 f5 D& L+ x9 _* T* l C% s" Y - ctx.setDebugInfo("rt" ,Date.now() - ti);
" i* y9 d7 Y4 o I - ctx.setDebugInfo("k", k);7 y7 p6 O& n6 M' K, {
- ctx.setDebugInfo("sm", kk);
0 I* g( `" A" r; b+ d - rt = Date.now() - ti;
$ o' D- ]6 y4 {- C8 z" W& w, u - Thread.sleep(ck(rt - 1000 / fps));
7 v# s w* A8 i7 _9 A* }) x0 H - ctx.setDebugInfo("error", 0)2 f/ a5 Y' P$ a3 h7 ~
- } catch (e) {
! E0 b2 s0 Y7 z - ctx.setDebugInfo("error", e);2 L/ \, S- L; b5 ]$ w& W5 M
- }
- q& C' b4 t4 y6 h! R - }2 ^6 R% o9 ^% N* A
- print("Thread end:" + id);( \- H9 ~* z, _ S. D/ R
- }( g5 `0 ?( R; Z- Y- v3 p. r
- let th = new Thread(run, "qiehuan");( j1 N2 {5 \ Y, P! u
- th.start();0 ~- p% S% |6 g0 ?! v
- }
6 R1 c2 p) M7 ^1 T: L: S0 ? - 1 ~: H# k" F* ^3 Z0 _8 A( {
- function render(ctx, state, entity) {
5 Z$ H' l G7 v; b3 u& r# Z - state.f.tick();
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- `" b' h5 v! Y1 q
- function dispose(ctx, state, entity) {( J4 n2 S. U' j
- print("Dispose");
- M _* U6 i) ]: J% e/ E( Y8 x% F - state.running = false;8 v! t; A6 u1 J0 s, Z& g
- state.f.close();
! |& E Z% O/ _2 x - }
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6 L; q# J& s% N+ P' B7 H: D- function setComp(g, value) {
. r: i0 C; f4 N. x' D& B% F - g.setComposite(AlphaComposite.SrcOver.derive(value));2 k8 g0 m* `4 M) V# z. Y
- }
复制代码 $ ^+ x' a# ~2 m2 e% L1 q& ` {! M
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。
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顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)- V/ y$ {, W5 o7 O. q
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