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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 i7 N$ ~# g! F
- importPackage (java.lang);
7 F6 h( s0 t% K- B( Q - importPackage (java.awt);9 s D) [$ Q9 J2 F: O+ x% w
- 9 `8 @; W0 `9 T: ]" N6 h
- include(Resources.id("mtrsteamloco:library/code/face.js"));8 B3 k6 {+ d1 x) I3 p' k) L1 Q
3 u( `! a* m5 B- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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% Z. G) L( e' I' R. O) [' Q5 \ C- function getW(str, font) {
; o! b' w L8 I' A9 G - let frc = Resources.getFontRenderContext();
! E" s* B9 m z - bounds = font.getStringBounds(str, frc);" {" H+ D0 E, U& }
- return Math.ceil(bounds.getWidth());
9 E K, r5 B; W* a) p - }2 F3 R; W8 H8 Y, R, U3 v5 b
- 2 e; U, m$ y' R G& g {% S
- da = (g) => {//底图绘制
% O% K4 n) e- E - g.setColor(Color.BLACK);* c0 I6 V6 o7 K: E3 X! k+ L
- g.fillRect(0, 0, 400, 400);
9 m4 \% }0 b4 g5 b; a( { - }
, E$ n. v9 S: q1 ^5 k) @ - " {$ `0 ^+ D- f C
- db = (g) => {//上层绘制
! \& }3 E. k$ i - g.setColor(Color.WHITE);; M4 {2 |* O O% t
- g.fillRect(0, 0, 400, 400);
8 S# ?+ b( ^* P+ P8 ^4 | - g.setColor(Color.RED);
' n) z! g) K! N j, B ] - g.setFont(font0);3 |. I1 ~1 B: u
- let str = "晴纱是男娘";
8 O+ Q) L7 }0 T - let ww = 400;
2 s% v, V6 c' M0 F' i* c - let w = getW(str, font0);
/ |, K* y9 R5 `& t! r. s0 F0 f - g.drawString(str, ww / 2 - w / 2, 200);
4 n* _9 [0 t' A0 e - }
- ^* J# }9 H6 p2 I2 q
- z- D6 ^7 f. C/ w [ K- const mat = new Matrices();' _6 i1 A8 ^4 @$ p5 R: R
- mat.translate(0, 0.5, 0);
: b: ]. L$ y& {: e+ t# x
+ X/ ~$ @) Y% K, @9 z- function create(ctx, state, entity) {
1 `. V' e3 Z1 s( E5 ~ - let info = {$ W O2 Y! f6 Z' t: Z( }
- ctx: ctx,
/ }* w3 G0 [# b - isTrain: false,- x- T- A3 ~! y r
- matrices: [mat],( P7 D7 E2 \) k$ n* L, `
- texture: [400, 400],4 U) {$ M' Y8 w& L+ |' b
- model: {
+ I+ ]" x3 Q, l% K - renderType: "light",% p# N: f4 z+ d: Q: J: O
- size: [1, 1],
4 W8 t; d3 k6 G+ T" m0 y; | - uvSize: [1, 1]
% O/ p4 m5 |9 U - }
- h- j o7 o. F' ~/ |4 V7 D' K - }
( o0 \* x# l( S - let f = new Face(info);
8 K2 A. r ]7 H0 G4 o - state.f = f; b8 \; m2 a2 O+ k3 M+ S
- * ^3 P+ q/ m1 M/ E- z1 C% l
- let t = f.texture;
" `+ a( u) a* @' Z0 V - let g = t.graphics;
$ d4 W* T r7 t7 I' z! T$ c# d - state.running = true;
$ _- t i) w- |# M% m1 } - let fps = 24;
# z7 ? q+ X: |3 {, O - da(g);//绘制底图3 q( k# O9 P& k: o; w
- t.upload();
: |2 @* j& K. `/ ^) C - let k = 0;4 U! s1 r" A* z* a( K# q
- let ti = Date.now();# \) B9 h. p8 x% b/ C: ] @
- let rt = 0;
& X, _+ A" h3 a& @0 K/ W) U) p - smooth = (k, v) => {// 平滑变化: I8 @: a; k q" Z; h. E: M2 y- n. d+ ~
- if (v > k) return k;
M- E1 `7 F1 W - if (k < 0) return 0;4 t2 L' W5 E, W, v v E# D
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;$ |- }+ j u9 Q4 {$ H8 a
- }
; P/ l, a) L! g* ? - run = () => {// 新线程
) G; O! K/ J2 O% ] - let id = Thread.currentThread().getId();
3 @4 _! y$ a e8 o - print("Thread start:" + id);* @' [7 G+ y( O
- while (state.running) {- `, ]! D" ]' o) n
- try {
5 m& K4 M3 B+ q% d; M+ H - k += (Date.now() - ti) / 1000 * 0.2;: e# x1 q$ c: ?2 N
- ti = Date.now();
/ Y( v. h7 y. M. _3 o - if (k > 1.5) {
3 h, }" I( `' ] - k = 0;
a" y% v" X) u$ [ d: a; @& y - }
c1 t1 K* \3 b0 J - setComp(g, 1);3 t; @$ T, M6 W0 U, i3 ^
- da(g);
( C+ o7 a4 Q' B! C2 o - let kk = smooth(1, k);//平滑切换透明度
" X" \7 j, m; A# c. `7 m& \$ L, d, X - setComp(g, kk);, N! z1 {* @: M1 K
- db(g);
' j/ i8 y) R5 P- E - t.upload();' {* n+ a& L' D7 P
- ctx.setDebugInfo("rt" ,Date.now() - ti);" {! v6 F W9 }
- ctx.setDebugInfo("k", k);
- w# P! ^6 @0 } - ctx.setDebugInfo("sm", kk);. y7 d% j# P2 q! r0 A. _
- rt = Date.now() - ti;
4 v/ u- U, P0 E7 P4 C - Thread.sleep(ck(rt - 1000 / fps));/ W2 H' {4 w' _9 y
- ctx.setDebugInfo("error", 0)
; ^/ k/ S/ F. `( F* D% ` - } catch (e) {
8 ~$ k* D, D6 U& Z+ k! O5 N - ctx.setDebugInfo("error", e);6 F1 Y; E% o7 x' d8 v
- }
/ R Z: {3 H' }2 d& Z3 b - }
\/ I' X4 B) x4 c% P+ O - print("Thread end:" + id);' F+ i3 w& _) r% O; {
- }6 K' {3 g5 `) F. u) \" b. e C/ u
- let th = new Thread(run, "qiehuan");: o& u, E2 h: ?/ F C: T
- th.start();
: z4 p6 [1 U0 h+ ^8 C - }
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- function render(ctx, state, entity) {
" U0 i& c% i9 V+ [ - state.f.tick();' y- f4 L6 Z1 H0 q* R% i
- }; L2 d5 ]5 N* U" I; H/ L
- & J5 X+ e2 |+ M! E% z& }* f( c9 I
- function dispose(ctx, state, entity) {
$ Z; ^9 U8 w8 u8 t3 s$ B - print("Dispose"); H# i3 p) z5 m- z' n$ p# H
- state.running = false;
; S6 M3 q" K1 E0 H& H& w4 L - state.f.close();
$ V: M, J* k' Z/ _. ~3 ^! w2 L - }
; n1 ?& I% {5 o, n# J - : u5 y) M' t) c5 u+ L* I/ [' m0 J; _
- function setComp(g, value) {
% d" L( e8 h, m3 ?9 w - g.setComposite(AlphaComposite.SrcOver.derive(value)); [+ U3 l0 E' ?- n8 o1 f
- }
复制代码 & @+ e' I; L0 Y; R
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。 ~7 J9 y& E7 I, Y8 N
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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)8 c" B8 f r8 z3 h! |4 d' J7 r
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