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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。
1 T% P" z3 B& J+ B$ b7 ]9 L- importPackage (java.lang);, r) L6 i. x3 Z: b( }
- importPackage (java.awt); b- R! e6 s& T4 m
- ! @" ?) S, `. Z" K5 @
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);% }4 s3 w# V. L8 X/ G7 h9 L% @0 Y
- m8 [3 x7 J8 ^6 n- r% b$ W8 M
- function getW(str, font) {, A: K) n, F L/ Q) g
- let frc = Resources.getFontRenderContext();9 Q0 U, [+ p7 C% C0 [
- bounds = font.getStringBounds(str, frc);
# }/ s5 B2 a+ [+ U' ^ - return Math.ceil(bounds.getWidth());
3 M( `2 m. D6 \ d3 x9 V' D - }
! x; a8 @3 c! X4 Q V
$ j# m( Z4 G% f- da = (g) => {//底图绘制' W2 \: X- ]" q& Q4 R9 B" {. Y4 U
- g.setColor(Color.BLACK);0 z5 J( \9 }& z) a1 E; t7 `
- g.fillRect(0, 0, 400, 400);
7 k3 o& g; d4 a - }
+ K. O, ]# b, Z! N P* G
+ H+ C8 M( C. t: \- db = (g) => {//上层绘制2 J( l% j, G+ `& `* ]
- g.setColor(Color.WHITE);' b) a" n6 L h+ M! M' C6 P% g
- g.fillRect(0, 0, 400, 400);. d3 L. P, I7 F7 h
- g.setColor(Color.RED);: {9 D0 M/ ^1 G: `$ v
- g.setFont(font0);
2 D% P% w* Y+ Y7 Z2 N( Z, }$ I - let str = "晴纱是男娘";; x6 O7 v/ ]5 e/ N4 ~
- let ww = 400; I9 b5 j/ t3 E
- let w = getW(str, font0);
5 t, A; `9 E1 i* w' P' g$ ?2 b - g.drawString(str, ww / 2 - w / 2, 200);% ?# K3 \6 [/ y0 u/ B% ^" d
- }
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& q8 @- w( P# k- G- const mat = new Matrices();% P+ c& g/ b% M! K2 Y) s1 r
- mat.translate(0, 0.5, 0); d, ^2 p% E3 c! u5 r' i
- 3 o# ?+ G; r1 |$ J9 ^9 [
- function create(ctx, state, entity) {
: t& L& y$ p7 o" C* H* P - let info = {
$ g- h" u, z J- Y - ctx: ctx,
: V- S& p f) d: }8 { - isTrain: false,) a9 j3 m8 K2 Z# p7 ?/ I7 ]$ m
- matrices: [mat],6 D& ^& ~9 Q3 Y6 d. n
- texture: [400, 400],
k: z3 t/ x; G( p6 U) f. B$ T - model: {
- O8 i$ c) H: M @ - renderType: "light",% |9 v; n) A0 n, L% h* [
- size: [1, 1],
) ~3 o9 M; ?: }! P! F5 e - uvSize: [1, 1]% x$ H! E; @2 k& R8 e
- }
+ w U0 A" ~( Y - }
% i. k0 w+ J7 I4 j9 U - let f = new Face(info);
$ v! m8 N: S, e6 ] - state.f = f;
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- let t = f.texture;1 T9 E4 {" P! L# L& [3 q5 D' R
- let g = t.graphics;2 A, b6 H/ f/ v( D% e( u# w
- state.running = true;2 l! h- q. |8 Z4 U, K2 y9 @5 ?
- let fps = 24;
) z' F4 s, }" ~9 N - da(g);//绘制底图
: s t7 ?, T6 p% z - t.upload();; X5 G% c2 y `, P$ ^6 }
- let k = 0;( s M' ~2 C! b, D+ h
- let ti = Date.now();
& h" O( Y7 J4 o8 N - let rt = 0;
+ O7 N: O4 \7 { g# u5 g - smooth = (k, v) => {// 平滑变化
, R% x& e: Q8 ^, O - if (v > k) return k;& W; z& _# H; ^$ X
- if (k < 0) return 0;
3 P; C4 z. v, c8 [+ r$ `5 |) z - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;, Q! F# v/ B+ [4 f' G4 p0 v2 V
- }9 K: B3 Q# B4 K% g1 ~' D" k
- run = () => {// 新线程8 g+ W$ f( P7 w; O( N; \9 ~8 d
- let id = Thread.currentThread().getId();6 [: m2 P! D6 e* k# H
- print("Thread start:" + id);
~3 @: w4 Z! z. s7 U# Y! w4 t - while (state.running) {
q; v1 W0 S2 d- z - try {2 o5 `8 T# L6 X' m5 k6 }
- k += (Date.now() - ti) / 1000 * 0.2;
# u& e& _& l+ h! u - ti = Date.now();7 B6 W' {3 f/ i! i4 a3 N0 A% C
- if (k > 1.5) {0 I# c0 z; x1 o2 l
- k = 0;
: n- V% A, v5 d - }
" V; u2 @$ D/ l+ ^3 M: i - setComp(g, 1);- P: y0 |2 `' |2 I# `4 B* e P
- da(g);
, d. z* C* V; R& m* O9 C6 l - let kk = smooth(1, k);//平滑切换透明度$ d8 e2 T; R' a- D# }; ~
- setComp(g, kk);$ w3 ~ N2 n, \ e6 v8 [
- db(g);: W1 b" R# M9 r! Z, `% q9 K# H9 u- S
- t.upload();3 Q8 ^" e8 s% L+ N7 C& _ ]7 C
- ctx.setDebugInfo("rt" ,Date.now() - ti);
5 V$ q- q6 J+ g# ?) Q+ I7 V - ctx.setDebugInfo("k", k);
) _/ C: Q. j r/ t - ctx.setDebugInfo("sm", kk);- d* s1 V' ^2 E* {- k- M
- rt = Date.now() - ti;
& M1 g- ]' W5 [1 c - Thread.sleep(ck(rt - 1000 / fps));
1 X4 w. B/ G0 ^- [# p - ctx.setDebugInfo("error", 0). f' u! S6 w0 a$ p6 x9 s
- } catch (e) {- C j. O4 \' d( l3 w( l/ b$ S
- ctx.setDebugInfo("error", e);1 r& u4 U5 i9 w1 w4 a$ p1 _# [- U
- }
0 {: y7 \1 t3 N7 c8 `+ B3 C% x - }5 H- s0 j: v9 x5 B2 d
- print("Thread end:" + id);: x, p" n; U3 T# g5 W+ E3 r5 \
- }% I6 E9 b/ l [4 ?& q f8 l
- let th = new Thread(run, "qiehuan");
6 m( C' U' I2 a; X4 u/ F - th.start(); [5 ]8 a6 ?* a" O+ y
- }
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- function render(ctx, state, entity) {7 X* m3 v/ b, P+ O$ l/ |
- state.f.tick();8 J4 @3 ~$ K. ?6 ?8 N2 C4 i
- }- w3 p5 X5 f; B6 G6 H9 b% ?
- T0 V# o7 M* z n. n9 w9 A
- function dispose(ctx, state, entity) {
7 \! `' m9 t9 O# K0 q* O3 n* I6 u: w1 J - print("Dispose");
8 |; `- Q' H2 ~9 `7 [" G h - state.running = false;
* c$ ^6 H, d" a, c - state.f.close();7 D! ~9 \; Q$ j2 e$ H/ D" D* K% O0 r
- }. B7 n' y( Y/ ]& Z# t2 c7 q. ?9 D
, g, N3 k& o+ [$ G- function setComp(g, value) {
( H) p( ~9 I6 p7 H1 W. ~4 ^6 p( T - g.setComposite(AlphaComposite.SrcOver.derive(value));- S% l& I0 f0 t8 h. R- l* W" Y3 _; r9 w
- }
复制代码 . |( |- A+ P. ?/ F
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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顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)# Y' M0 X7 d9 K+ \" W' p% T, B
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