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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。4 c) D! b& w1 F! o/ W, [4 `
- importPackage (java.lang);( l0 ^6 G1 L5 v1 A, L
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));: e4 L9 s5 Q! D! K0 i
- / H- Z6 T: \$ [8 j. Z, S
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);4 [& ^+ o3 T7 V
- 3 g f9 `. ^: M: c
- function getW(str, font) { S, q( H& m2 E- H: O
- let frc = Resources.getFontRenderContext();0 c' t# E+ e/ e! X
- bounds = font.getStringBounds(str, frc);. O, D: O# |8 U0 q% F4 I( _! z; J; t
- return Math.ceil(bounds.getWidth());
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- 5 {% J d |; Q
- da = (g) => {//底图绘制
& S# w: f; O6 X& ?. F. ^ - g.setColor(Color.BLACK);& a' |4 ]! e* O: d+ e
- g.fillRect(0, 0, 400, 400);
& {7 B) {: q, _" y - }7 v9 H' G- ~5 o; `* `7 I2 E
- " O% q) K \) |+ I
- db = (g) => {//上层绘制
0 T; E/ @# J. Y1 _; l - g.setColor(Color.WHITE);' k m; @) @+ \" u
- g.fillRect(0, 0, 400, 400);) a4 O2 N: | }% A; ~
- g.setColor(Color.RED);
5 F3 v4 c: @ y. q! i - g.setFont(font0);
8 n% q6 n0 j$ Z0 m! [6 G, i/ }7 c$ G - let str = "晴纱是男娘";- u6 g g0 y4 B# _5 k3 n
- let ww = 400;
% j" [0 ?6 U- Z0 o9 _1 k# `7 U - let w = getW(str, font0);
Z) l1 f2 A2 o - g.drawString(str, ww / 2 - w / 2, 200);! X2 g; g+ { J- }% O( M
- }
! \- V7 }% A+ g$ h, d
5 b3 ~$ E0 Q: Q% B- U- const mat = new Matrices();3 y9 {1 w8 I4 b5 \) b
- mat.translate(0, 0.5, 0);
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+ W+ H: m& e1 q% H4 m- function create(ctx, state, entity) {" S" W0 B: U/ m4 z) r) Q3 k+ M0 e
- let info = { X0 N T" q9 _+ @
- ctx: ctx,: z( j$ _6 M+ W9 p
- isTrain: false,
4 ^) P4 Q: ^$ K0 h% X& c* @ - matrices: [mat],8 m* n; H2 W& p8 I5 W* y7 ?
- texture: [400, 400],& p- u( E, n- K- k" u. ~1 O
- model: {
* ]7 P# R5 S! Z" u$ X - renderType: "light",
6 ~' h' L% E- d/ Y& R; N - size: [1, 1],+ V2 R( j. t: n% l7 X3 _; @
- uvSize: [1, 1]5 ^4 J% [9 M" a! f, ?
- }% D1 F5 q. e7 [5 L2 F3 q! i
- }: W' q7 X5 L) i0 P9 i" K% o: v i
- let f = new Face(info);2 I' i/ P" g7 V$ d1 p
- state.f = f;7 v& K7 P% p+ I2 A) G( o' J
; I" L- ?- i5 ^5 f' A+ L- w O6 p- let t = f.texture;' F7 ^4 g; m0 q- k! f
- let g = t.graphics;
* C' [8 A7 \6 x* p# Z3 \ - state.running = true;
; J1 {1 J/ Q; v( s; h; H, k2 [ - let fps = 24;. ^" L K3 [' U" q; j9 }% G4 \
- da(g);//绘制底图* [' ^3 C2 h- b( U1 r8 C
- t.upload();
7 w6 O% g" k I - let k = 0;! m3 R2 J- k1 \7 ^
- let ti = Date.now();" v! d/ V# ^# m. c9 I8 e0 V4 L
- let rt = 0;! L! G6 R) ]! e3 ?
- smooth = (k, v) => {// 平滑变化
! ^: k" y6 q+ G4 [: F0 h - if (v > k) return k;3 e L% n/ w. T5 h2 z
- if (k < 0) return 0;* a4 y) C, e! W2 d: T
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
: }* q, G' _: S: j3 ^ - }6 E+ ]! }- A& A @6 k( B
- run = () => {// 新线程( D7 t# H" S9 ^8 u( K) K
- let id = Thread.currentThread().getId();$ ~( w$ ?% q- e. [ t- j) V
- print("Thread start:" + id);
. r# g/ `& V1 ]9 x' e - while (state.running) {
8 v# N' d4 W. q( z; D - try {
2 V# ~3 b6 ^# x: G: U5 B4 j - k += (Date.now() - ti) / 1000 * 0.2;# l- u }9 C; q' B# k; c
- ti = Date.now();
x8 J4 Z2 C& |- Z' Z - if (k > 1.5) {
. {9 F# L* q2 P) s - k = 0;
/ I& Q/ h6 M1 { - }" n, [5 Z0 }: ?
- setComp(g, 1);0 P J; a2 E# C$ x: B4 O
- da(g);
0 K- a- C8 ^9 f- g6 a* C# b - let kk = smooth(1, k);//平滑切换透明度! N& R1 A4 a$ _, ?& M
- setComp(g, kk);! H" k3 B3 f1 S8 a
- db(g);
3 o% }8 S |2 Y- v/ B& w - t.upload();$ F+ B; j+ H' U# ^! L! y
- ctx.setDebugInfo("rt" ,Date.now() - ti);
( U- V9 S, B& s - ctx.setDebugInfo("k", k);" U& i9 n0 q( s ?/ d: X# T7 C5 |+ a) O
- ctx.setDebugInfo("sm", kk);
; Q I( b8 ]* L - rt = Date.now() - ti;) B, K5 ^6 \$ c/ f9 |$ B
- Thread.sleep(ck(rt - 1000 / fps));0 ?3 S) f3 d% F; h6 F* u
- ctx.setDebugInfo("error", 0). g& k* L$ Q- s& [! B" D0 q, x
- } catch (e) {) W8 b. F, Z4 a( C9 n, j' x5 H
- ctx.setDebugInfo("error", e);
0 W* _ d/ Q$ v) B3 A4 q2 u+ ~ - }- D* G i' Y2 R& {' I7 G+ ?$ d
- }
3 W4 S8 {/ p: Q4 b( j( R! L - print("Thread end:" + id);
, T- O, s' d4 p1 W: P1 q# R - }
3 E8 ~, m* ^, ^; l" m - let th = new Thread(run, "qiehuan");
7 w- E4 ^, f' [7 X" ?) w - th.start();
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- / p, x9 w* g$ G1 o& p4 o4 R4 s% U0 w/ L
- function render(ctx, state, entity) {
0 q9 H9 X0 b @$ q9 B+ `6 f0 a - state.f.tick();
! k* C( @% N" I3 N1 h - }) {9 Z4 A0 h W7 V& \9 G
- , ~1 H0 {+ `6 l5 e
- function dispose(ctx, state, entity) {
" j0 e N9 E( o" i- o( V - print("Dispose");7 e$ a8 C8 I3 d+ j$ H; j
- state.running = false;
! v( H9 b4 @3 k. D - state.f.close();
( A: w2 A6 b {9 } - }
$ y4 h% m/ ~$ W# k
6 H: A- B" N! k" D& m: P! x- function setComp(g, value) {
8 M# A7 \; W. ^- Q; q9 t4 D - g.setComposite(AlphaComposite.SrcOver.derive(value));+ V2 V; i. X! j: y1 w. I/ L
- }
复制代码 ( \ {* B4 Y" R4 J* J
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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C7 W5 E7 o7 C2 o顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)7 b" m: `6 h; q! U
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