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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。+ G8 Z! l. @# r% v0 Y" U/ g
- importPackage (java.lang);
: p" o, u, p, Y [ - importPackage (java.awt);( Y# }# H) P/ ~' w7 h& K" h
- ) u1 }8 r \+ w* ?7 q! s7 u2 ^
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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1 C6 p9 K0 `5 P$ z, ^" X4 p: D# w- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);' c. I; l9 V1 D: j$ Y
# [, V9 G4 q& V" ?& R( O% Q: I- function getW(str, font) {0 m. I" J) b9 x7 k/ Z( V( P
- let frc = Resources.getFontRenderContext();
( c, q$ }) m* o& L: @9 I - bounds = font.getStringBounds(str, frc);
& @6 ~! f3 [! E* B# ~ - return Math.ceil(bounds.getWidth());
% ^* f$ U/ S8 w) c( ]: Z - }4 Q5 D) c( i( E. R1 D
& ]& D, M) \1 a+ E- da = (g) => {//底图绘制
6 [+ R( \* U6 A" k$ N - g.setColor(Color.BLACK);% O9 N1 `+ [" r7 Y) z
- g.fillRect(0, 0, 400, 400);( ]2 t& ~' I4 J$ g
- }
" {. y' \; }. t+ Z1 d5 U6 S7 T, E
$ H7 F' a" q9 b o- db = (g) => {//上层绘制3 A( a: e& }: D
- g.setColor(Color.WHITE);' Q+ t' A+ `; S; v# p
- g.fillRect(0, 0, 400, 400);5 U0 W/ W* N8 o" z
- g.setColor(Color.RED);/ Z! W1 |. g) ?
- g.setFont(font0); d u- _6 R0 U) g! r
- let str = "晴纱是男娘";3 q* O. X0 K- R0 |, Q' e9 q; B
- let ww = 400;/ ~; L, p! f" K$ G% _6 _
- let w = getW(str, font0);: i0 M+ z% o3 C
- g.drawString(str, ww / 2 - w / 2, 200);
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- ' i( y/ v; h# @. j; |" c0 d
- const mat = new Matrices();/ P; A% O0 Y* K* |( i F) I/ l
- mat.translate(0, 0.5, 0);7 k; p* U+ K) l* w2 }$ p8 w
; F1 B, S, m- `. M- function create(ctx, state, entity) {
]+ l8 g; ]. N6 M) G$ U - let info = {
; y4 V9 T1 K* L9 c - ctx: ctx,
, ~8 ^- u: h G, s( G/ T1 @2 ` - isTrain: false,
% Q/ J$ g; v' P - matrices: [mat],
( x1 b! @+ M+ H4 I2 C - texture: [400, 400],( m& \) w( r# o% G5 K
- model: {
" u* K3 Y7 |# z3 S. Z - renderType: "light",1 e6 P( p1 I% I; K# u3 q5 @$ V/ o
- size: [1, 1],
5 f5 e% D) V$ }+ E9 X - uvSize: [1, 1]: b" r9 H- v$ e
- }: m1 \ m5 R3 d
- }5 {4 N& w; ]4 P7 E) M
- let f = new Face(info);
8 P4 e" G/ G8 c7 o# h& m - state.f = f;
$ I2 R, D9 l8 a4 a - 6 y o5 M, E' I+ s' z& r `& a+ \
- let t = f.texture;
" H" \0 T% p/ r3 R5 u5 E4 N" R: V - let g = t.graphics;
* {) @ |8 U. S. p6 e4 f/ \ - state.running = true;
: [# a2 c" G4 {+ s# A- i- p! v - let fps = 24;
$ T5 L5 R. F& k& ]% r4 M - da(g);//绘制底图
7 s ?* @$ O9 E - t.upload();% Z' L1 G5 z6 }; t1 |6 O5 V) V
- let k = 0;- R: z% h0 k: g! ]: C! }' o
- let ti = Date.now();% w0 E9 J0 E, {% U
- let rt = 0;
) j: R! g' n( ]' ?, i - smooth = (k, v) => {// 平滑变化
& v* \- S5 t( M+ u - if (v > k) return k;
) n3 O# w; s, ~; p+ j: e - if (k < 0) return 0;
$ i. Y. |! t/ E - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
3 H0 o' J6 U' L' w( n - }
* J$ ~0 `% K, Z - run = () => {// 新线程, f/ i @. | D/ F5 F& O' y. A$ J, Y
- let id = Thread.currentThread().getId();
$ f7 r/ f3 N% z - print("Thread start:" + id);) d* T. ?' R' e3 _1 o
- while (state.running) {# q: T m" O: V7 ]: _
- try {* C( v7 s& [: U
- k += (Date.now() - ti) / 1000 * 0.2;
' J6 s% e4 z1 F8 [- _ - ti = Date.now();
$ S, S6 P1 E- F* o. i - if (k > 1.5) {( @7 m4 @2 b* E1 u u' T3 ^ \+ T
- k = 0;
! G# v2 n3 i C$ L2 |' ]7 e - }% M, h. E2 z$ [% B+ w' X# O& z [
- setComp(g, 1);
2 c2 G X4 X+ S \& E - da(g);. N# N2 M% i( l( | p0 f7 I
- let kk = smooth(1, k);//平滑切换透明度
* T, u. `5 b$ A" m; n* T& ?: ^3 r - setComp(g, kk);7 @" b- _3 p3 A. J6 s' A
- db(g);1 t3 b0 P$ a6 j
- t.upload();
4 o+ ^8 G1 P( V7 e - ctx.setDebugInfo("rt" ,Date.now() - ti);
' ~3 y2 i# B* H* P( P$ n5 ^ - ctx.setDebugInfo("k", k);1 N& X( ]6 E0 k1 D5 y" i! b
- ctx.setDebugInfo("sm", kk);
' _8 S$ G2 M7 I; | - rt = Date.now() - ti;
5 j$ u, F" p+ l* i' _5 q - Thread.sleep(ck(rt - 1000 / fps));7 Z2 K& y# d4 a$ Q; [
- ctx.setDebugInfo("error", 0)* v& i$ s0 i/ D
- } catch (e) {! m1 B& `; y v8 P8 U3 g. R9 _
- ctx.setDebugInfo("error", e);7 c8 ~$ {3 ~6 i3 g* p
- }
: w& H4 P9 a/ U5 N+ \" L - }8 E+ v' P+ @, o: ~5 A6 M8 m
- print("Thread end:" + id);
+ J. x2 \9 c8 s% s& i1 | X - }& L' {% ]3 u3 P: O% X4 W! a' D; i
- let th = new Thread(run, "qiehuan"); b' }( M& o7 n4 n' r# i% `1 n
- th.start();
* z: p7 X; _' I# ?: U - }
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- function render(ctx, state, entity) {
7 E0 m6 B s; d8 K, ~8 G/ }- i - state.f.tick();
0 c: c* H% |1 a! N0 X. p: { - }
- x j/ x9 N8 t/ W& `) n6 Z9 F - : Z* n0 D+ y& p' D# _
- function dispose(ctx, state, entity) {
5 r" E2 t5 ~" M3 | - print("Dispose");
! \' I8 P0 K5 M% b: B# d - state.running = false;2 D9 z% t0 I& n/ | a
- state.f.close();4 Z% J: w) y& G2 s9 C2 B
- }
. B7 W- f- } a8 ~0 c4 Y, B - & K1 d) w- q0 u: n
- function setComp(g, value) {) M, j [ O0 Y" P- E
- g.setComposite(AlphaComposite.SrcOver.derive(value));
! D! M* I1 j2 x+ ] - }
复制代码
' y, [( ]( Y& j" \. c6 b% W, 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。/ ^$ W3 Z1 D" q' X4 `- [% ]& P
7 Y* N8 z6 M( C# B3 E l4 `
- _9 R9 n9 q5 s* t i顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)
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