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5 @6 U4 I; A) V/ v: l" A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。
+ G7 T& M- N- n W5 R# |- importPackage (java.lang);6 |. q8 d2 _; d1 l
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));; s2 S- V; X7 J; m6 u7 G* V. `
- 0 F5 ?$ j6 `% N. c
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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4 |6 s. R: r' [- function getW(str, font) {: O2 q# s6 I- @* y8 A: H2 c0 K
- let frc = Resources.getFontRenderContext();8 m% L( M; Q1 k# ?; M
- bounds = font.getStringBounds(str, frc);5 ] E8 N3 o0 \! R
- return Math.ceil(bounds.getWidth());3 g5 J% B" j# C' I
- }
^) U: y8 U/ h% h' u
2 P6 z; \6 }2 f- da = (g) => {//底图绘制
- I- [" U- ?4 Q! v. w n6 E f! { - g.setColor(Color.BLACK);
. |: M" f; E+ h7 w) ?1 I$ r - g.fillRect(0, 0, 400, 400);
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u5 Q. H. [4 R6 d4 O- db = (g) => {//上层绘制 ^( F4 T5 c, l9 b V) a# u1 n- W$ W
- g.setColor(Color.WHITE);8 _/ q( E* n& e B& w6 v
- g.fillRect(0, 0, 400, 400);
. v; x* e1 P' v6 g; r7 Y2 c& P6 g - g.setColor(Color.RED);$ q& |) H L/ G) @% l$ c
- g.setFont(font0);2 e z5 B# v6 X* X; d
- let str = "晴纱是男娘";) Q! @5 a( ]0 z8 |8 K- F
- let ww = 400;: S y) z9 a" Z! a
- let w = getW(str, font0);
j& C0 n* }; w0 D8 g& P6 I' b - g.drawString(str, ww / 2 - w / 2, 200);
% a6 q2 L# H' Q1 r' s - }
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- const mat = new Matrices();
4 Q5 D+ A; l& g, P2 L - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {3 f; S+ n- [. `
- let info = {
9 T O, I' O% ? - ctx: ctx,
( B5 k: Q# Q/ x! l% m0 y+ T0 b$ U2 [- r - isTrain: false,
! m9 X2 ?& V# a) M( H& ]* S - matrices: [mat],1 J: K1 o% c# ^
- texture: [400, 400],% W- P/ D1 I, D; a0 q8 P# e
- model: { |! j* @3 ?4 Q1 K! m: O
- renderType: "light",6 t3 S* p: Z- y: E7 L
- size: [1, 1],2 N. T; x1 ?6 O+ B9 A: J
- uvSize: [1, 1]! h9 ?* A3 i, D( e$ P/ {3 V+ w
- }
$ h+ J' {7 J+ z! G& V% U5 d+ w - }
6 F/ x: x9 b u0 O" I - let f = new Face(info);+ z- H5 f. w* v0 M+ a
- state.f = f;5 M9 h! o3 s$ _+ q7 \; G+ K
' v# B$ c* M! U1 W# n' b: b. I3 Q v- let t = f.texture;
z4 a* x5 U5 ^ - let g = t.graphics;
c- s9 o- a; b - state.running = true;2 i1 u d3 k, q6 t
- let fps = 24;
$ f, e+ Y+ A4 Y/ m, s) ^! \ - da(g);//绘制底图
/ \, W* l% y; }! Q - t.upload();
0 e5 z% e( y9 z1 a2 \- f$ ? - let k = 0;' ^2 G, d) J2 T. d# g
- let ti = Date.now();
$ c; a$ B, U1 o - let rt = 0;, X' D2 N& z) a" L: R# S
- smooth = (k, v) => {// 平滑变化& s, ]* f9 e; f; {; v0 m' S, t1 o4 q
- if (v > k) return k;
( l" `6 t- m6 ?4 x4 ] F' b' H8 o - if (k < 0) return 0;! `4 c: ^# ^% ^, W% D/ u
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程
3 h% Z5 S; `* S, G3 P" M - let id = Thread.currentThread().getId();4 A% a% [# G7 Z0 o, k
- print("Thread start:" + id);& {) s$ Z$ @& Z+ \' C- L9 S
- while (state.running) {
; E. [) i4 ?. R5 u* J - try {
2 J0 T) z# {2 ]3 i% A) U. d - k += (Date.now() - ti) / 1000 * 0.2;
6 y% w1 `, l: {1 W7 z+ C4 L S: q - ti = Date.now();
. C. g. I; h+ ]% Y - if (k > 1.5) {; L6 `$ t: L2 W _- T; l9 n
- k = 0;5 T) x' E# ^3 A7 x; P$ I
- }) E# Q) l) r1 G5 P
- setComp(g, 1);
4 t1 Z6 \+ j# `" r t% |" d/ ?4 U - da(g);9 b' T: r2 c+ W- W2 T
- let kk = smooth(1, k);//平滑切换透明度3 L7 b7 M( h+ ?$ R0 V, W
- setComp(g, kk);% ?1 K+ ?2 ]% p9 ~ K! X! y5 h2 \
- db(g);& ^/ V+ k9 j: Y+ ~
- t.upload();
0 [4 T( V1 k) g* B6 C/ { - ctx.setDebugInfo("rt" ,Date.now() - ti);
- M- U1 C9 Q7 f: J- I4 f - ctx.setDebugInfo("k", k);
8 T" p6 k4 ~1 M2 |- q+ b - ctx.setDebugInfo("sm", kk);5 _/ Z( ?6 p+ S, z4 ~3 | r5 k
- rt = Date.now() - ti;0 f2 K5 y$ E/ ]3 z6 v: G- M
- Thread.sleep(ck(rt - 1000 / fps));
, U! I# x9 U H: q( B1 t# R- L# V# U - ctx.setDebugInfo("error", 0)( b5 V5 y ^4 _; E9 I; W
- } catch (e) {7 d* J& _( V) r, z. x: \
- ctx.setDebugInfo("error", e);7 g9 @9 _) c! |$ o- n2 c
- }( x" O4 D `( Y
- }1 }& {1 n1 n& F; N$ i" [
- print("Thread end:" + id);
7 Z. x2 X5 W) k. e) c( d. n - }
9 E4 W6 i) I# z* ] - let th = new Thread(run, "qiehuan");
3 ~6 f2 M/ p1 R, N; w - th.start();4 }: X9 o: a" X+ }
- }
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- function render(ctx, state, entity) {$ [2 u- B$ A# C0 a& q
- state.f.tick();
8 X1 F( ]; H, p- ]5 m i* M$ H - }
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- function dispose(ctx, state, entity) {
7 N. u$ ?! R' } - print("Dispose");. |! V1 @" e* ?2 L1 q# Z# m
- state.running = false;
# Q# P) R0 _1 @, | - state.f.close();( f1 ~0 v; E3 J' l
- }# A6 b* u9 f ~% q/ \) v u3 G
- 1 ^! h1 }2 T* z! R- [
- function setComp(g, value) {' @* N1 }3 R" [, f+ ?- x9 y6 k6 I4 X6 r
- g.setComposite(AlphaComposite.SrcOver.derive(value));. M$ Q0 L4 ]& p) Y) p- B/ E
- }
复制代码
/ q% \' U6 V3 K. K2 q# _1 C, l: k/ ]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。) |6 q2 Y* O- `& `$ `' t* @
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6 x8 z% E8 P9 k' T, R; f; c4 Z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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