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6 r" C2 {0 D4 G5 n: G7 U' 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。
8 X0 t& @! J# m6 t% H' l! d/ g% |- importPackage (java.lang);% Q4 K9 S" Y, @& H
- importPackage (java.awt);
% o6 |$ O1 U$ o- m! U - % i! u) j! J. U1 ~
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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g7 |! E7 w& d& g- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);6 A9 y3 x& [2 v1 Q* R* [1 |
- , Z' ^/ Y& ]/ _/ m
- function getW(str, font) {' X( { P: k, f2 M
- let frc = Resources.getFontRenderContext();5 X D( J7 q7 j* J/ e4 p b
- bounds = font.getStringBounds(str, frc);6 o9 ^$ \ W. d W2 H
- return Math.ceil(bounds.getWidth());2 ^5 \* `; g* `
- }
& |( d- Y/ e9 j3 I m- _ - , D/ f) l. z- J$ M3 m
- da = (g) => {//底图绘制( o* K$ V$ i* M! L: I& N- S
- g.setColor(Color.BLACK);1 `0 g+ q- ]9 q' }4 ~
- g.fillRect(0, 0, 400, 400);
; w" Z% G7 z4 v/ b, ~# ?% s - }
5 O, Y4 ]; ~: m r' U - + I9 G7 H, H( R) L1 r4 m
- db = (g) => {//上层绘制9 \% X( N4 H, b) E
- g.setColor(Color.WHITE);
5 l$ {/ C9 t6 `& ~ - g.fillRect(0, 0, 400, 400);3 L6 C2 o! r8 l8 }; r7 m- N
- g.setColor(Color.RED);
2 n3 |# |5 j8 N( r - g.setFont(font0);
. y8 S. k! c& Y1 l5 L9 r, k - let str = "晴纱是男娘";
6 [- T x# f/ d: } - let ww = 400;
; \ f! E$ Y* y6 X2 i - let w = getW(str, font0);8 \7 |# _# r$ }+ Q; c, N
- g.drawString(str, ww / 2 - w / 2, 200);8 K( t5 X8 z* {! x3 I, W
- }
9 M( A4 w( k( ?) b0 p# |; I/ u - ; |' l% ?7 I) h$ @- P
- const mat = new Matrices();! \, \! O. c( {# A" J8 h1 |! p4 X
- mat.translate(0, 0.5, 0);
1 p4 U: c {+ t z. O
- S8 k$ K" m, E: T" [5 m' {4 x {/ B- function create(ctx, state, entity) {4 m% y8 ?/ Z" B H
- let info = {2 b7 B& G w3 e& R" p" j* `1 L6 e
- ctx: ctx,
" l# e) d% X- ?! f - isTrain: false,7 ~! X h/ e% z2 L& f
- matrices: [mat],
, J$ O- A. W' o - texture: [400, 400],5 `8 n( g3 c! n. B
- model: {+ v* ]% K' J) w3 U5 [
- renderType: "light",. r( t, i: v# `' Q0 j$ }
- size: [1, 1],- Y% R' f0 w2 c6 `" A, F
- uvSize: [1, 1]' @; m# A6 t6 a$ g, K/ ?1 g
- }
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- let f = new Face(info);
# i6 A, k: w P - state.f = f;
% Z7 C0 S: F8 r" w+ d% p' H5 A6 C2 f7 M
" a; o, i: k9 Z% p n2 J( @8 i- _- let t = f.texture;
4 u" q6 m5 X! ~) H' _' l9 C - let g = t.graphics;
3 } W% d9 m8 C6 B, @0 f1 @ - state.running = true;" L* a1 k$ x9 P$ l* l
- let fps = 24;
/ O2 |; q0 B2 C( p5 |, S% @ - da(g);//绘制底图
$ M5 c" u; f& N& |5 l/ a - t.upload();
9 d. u' {( ^) _ - let k = 0;0 x. \! t$ b" `7 s( T4 B/ y! n' N/ m
- let ti = Date.now();
2 o* m K1 f' y - let rt = 0;3 c1 K6 @* T7 j7 t0 z% \1 W) l
- smooth = (k, v) => {// 平滑变化6 |6 ^; i& _3 g( ^8 i1 u% k$ L
- if (v > k) return k; I* O% [8 I' m6 I4 \$ R+ g
- if (k < 0) return 0;8 l% n7 j9 F% q: k" E, |# g
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
$ O2 G0 \ R: \; d1 f Q - }3 x) X! ^5 U6 [5 a5 V6 [
- run = () => {// 新线程9 t# k( K9 [/ f- E2 E
- let id = Thread.currentThread().getId();
; ?& h0 }" J: h' A6 A2 d0 e# C - print("Thread start:" + id);
4 t+ o/ [2 W1 I! l - while (state.running) {
. t3 ~0 F- N8 w; F0 c& a* d* j; x+ O - try {. w# V6 ]2 J0 n2 y
- k += (Date.now() - ti) / 1000 * 0.2;
3 V9 A$ a5 d, r a - ti = Date.now();9 R. {/ _7 [" S. p0 J
- if (k > 1.5) {+ `! x: f; ]1 \+ G- F" S
- k = 0;
! ^& | L* v* y' M - }
' m6 O! s; [+ P/ K# @) [6 t6 V - setComp(g, 1);
- v( |6 F/ L0 s0 K - da(g);
0 b6 T" {& p/ D; O" I - let kk = smooth(1, k);//平滑切换透明度6 x9 }! j4 }& J! a D
- setComp(g, kk);/ n% D% i7 n- Z6 e# k+ L6 L# F3 @$ \6 ^
- db(g);
! ]3 N( ]- P" k- u9 m& Z: | - t.upload();
8 m, A# D2 f5 S - ctx.setDebugInfo("rt" ,Date.now() - ti);8 R J; {6 j4 h( A! p
- ctx.setDebugInfo("k", k);
- Z, \, U/ A6 B9 e3 n1 @# L - ctx.setDebugInfo("sm", kk);8 Z$ L* e0 O. z% D6 v
- rt = Date.now() - ti; ^# [9 i5 p$ Q5 _ A2 \1 Q; o
- Thread.sleep(ck(rt - 1000 / fps));$ x& F- J5 x" f" ~/ a3 R& ? `
- ctx.setDebugInfo("error", 0)% k2 M+ q6 n8 |$ T4 S
- } catch (e) {
0 N* ? j1 E& B - ctx.setDebugInfo("error", e);
% n; F) o4 `0 p4 S+ ~ - }" |- B; t3 O. P& j2 T
- }
+ H; B$ }- Z# B5 `# B- z - print("Thread end:" + id);" M. B& }! `& b! F# a Z/ s& {
- }) E8 a; z n& p
- let th = new Thread(run, "qiehuan");4 e! Z, G9 e- }2 p
- th.start();9 _0 O7 U0 ?. \
- }! W r+ Z: D: x& v
/ O }) g6 J( v1 Z& k& N7 K- function render(ctx, state, entity) {
+ W6 [7 h, J7 X, W" w3 a0 } - state.f.tick();4 K2 z2 A$ L8 z& t5 ?4 X( @( I- J
- }: D* [* Q7 q% g
! L! C3 y# K4 I! d8 b: K- function dispose(ctx, state, entity) {
6 X5 V) o5 w! d - print("Dispose");
$ Y/ b8 \% [7 S: M; D4 ^" N - state.running = false;- y6 D0 K) S3 U1 b; c: j
- state.f.close();) p. ]) ?3 w$ B/ a3 d
- }
: ]# a) l% X; L" ~! ~- R5 R
) Y2 E* G5 k, e! s- L' x/ P8 U- function setComp(g, value) {
3 K" [1 ]' E7 Z8 H0 l0 r8 V - g.setComposite(AlphaComposite.SrcOver.derive(value));! b' E! n- \* ~8 ?
- }
复制代码
9 E* e% k- o8 y" Q& e. r& e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。. [# I, m* B* D" [
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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)4 N# g/ e- I5 ]5 A
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