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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。
7 `& E$ m3 o, p0 u# v0 J" j- importPackage (java.lang);3 }" K. I1 E7 U; c$ u) B# h
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));. I& t- P# O6 |
- 5 d8 }6 x* n4 e0 I8 U2 J9 u
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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' _+ P1 O: f8 C- function getW(str, font) {, z1 j6 P9 G7 F) f& F
- let frc = Resources.getFontRenderContext();
. g3 f% i; m0 Q1 H$ P6 j - bounds = font.getStringBounds(str, frc);
# o+ }* Q& ]- N: r( a - return Math.ceil(bounds.getWidth());
7 w L; v4 i' z& m6 f- {9 Z - }
+ {4 ]* o- x/ y, Z! [
" ?+ q: M% X9 d* Z% o- }$ s- da = (g) => {//底图绘制
2 T7 K. P5 W. U8 ?" R4 V: e - g.setColor(Color.BLACK);4 e' O9 W p& v6 g; h
- g.fillRect(0, 0, 400, 400); D$ M! `' m! [ m" }
- }
0 _& r7 h: J: s8 i; b
2 j# s; P) K5 j. M; y- db = (g) => {//上层绘制& a; L% T+ m1 _9 R! C8 k6 H9 x
- g.setColor(Color.WHITE);
4 ^# p, V/ \+ E1 z1 K - g.fillRect(0, 0, 400, 400);
8 C3 b. K1 i$ B% ^2 n - g.setColor(Color.RED);
) [6 Q, s" l# ~4 }3 R - g.setFont(font0);9 c! X6 L. v5 a- r
- let str = "晴纱是男娘";1 R3 p- M/ z1 k
- let ww = 400;
6 L7 Z( j! ] ^* i3 C! r Q - let w = getW(str, font0);) T2 C% v/ S4 u+ j" D
- g.drawString(str, ww / 2 - w / 2, 200);
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- ( V3 h, j; J' B; \4 x* D4 `7 y7 r
- const mat = new Matrices();+ g- x4 ^% M/ z. m1 z b2 c
- mat.translate(0, 0.5, 0);
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& c2 n; p! d& }: {; E, {, I- function create(ctx, state, entity) {
/ {; y. Q7 Y2 D - let info = {6 y7 ~. O0 D/ a6 J0 f+ `
- ctx: ctx,) j- w+ L( T/ n5 o- q* V5 m. F* a
- isTrain: false,4 x. e/ W6 c ~: J0 } [6 a
- matrices: [mat],
, s2 k0 V! O$ z8 p, L( e$ a5 ] - texture: [400, 400],
/ B+ I/ k! D6 V* M) Y - model: {
7 C. r$ T, G6 K5 W - renderType: "light",. v! A* A! l l6 U/ J* |
- size: [1, 1],
3 d4 u9 D1 ?) @& c$ i- K - uvSize: [1, 1]& c+ r" ]5 d9 ?9 ~
- }
5 r* f; p3 \5 k5 j! C6 H' U - }
3 u, C! q8 x% y - let f = new Face(info);
7 `/ a+ e8 V8 U0 o( \' |+ g - state.f = f;
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5 X3 Q* L% q" e k, z- let t = f.texture;; \7 Y, u6 m. h) G- x. }$ D
- let g = t.graphics;
w) _6 x) A* }; A - state.running = true;+ {1 j: l5 E) l& S0 T
- let fps = 24;
/ @4 W @% ^- _' X; J7 k! D - da(g);//绘制底图2 Y7 j3 l- q4 C$ N+ M* R
- t.upload();
9 ]) H! ^% A4 w( b8 F; A - let k = 0;
2 K1 e. Q* k- z& H; w6 d% d - let ti = Date.now();+ u9 G% |& H3 h! P0 n* U) g7 E
- let rt = 0;
1 r- Y# B5 a- D8 D$ I - smooth = (k, v) => {// 平滑变化
; w5 \; T7 h5 }5 M/ k7 R - if (v > k) return k;' a o4 ?3 [: T
- if (k < 0) return 0;. x' Q; _- ]0 [0 N" i1 Y- B
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;! P$ j. p( Y* m
- }
7 a, x- d8 H' m* A# d# e* d - run = () => {// 新线程
" ]9 u3 Q( i! ~5 q8 b1 e, K; A - let id = Thread.currentThread().getId();
8 T# R! x9 R! c3 t5 L: B - print("Thread start:" + id);
, I1 c+ `8 N0 B, H3 U, i0 u2 ^# h - while (state.running) {
7 A9 c% W6 C+ J! T$ c( U - try {
/ _/ E7 B9 T4 B3 K+ N - k += (Date.now() - ti) / 1000 * 0.2;4 l& G0 g+ o) _/ @6 d5 n
- ti = Date.now();) W" v' ~) w- P: N& S
- if (k > 1.5) {, |, ^, E" F" D+ B' ^+ Z D
- k = 0;
, R: R( l# D- ^' a - }
# Q2 ]2 I* ?7 k" |% p1 ` - setComp(g, 1);
- i3 E# D, }& C5 r7 [. _ - da(g);3 ]+ I/ c) a8 {7 ]( y/ w: E4 L
- let kk = smooth(1, k);//平滑切换透明度( C5 t4 b/ m% t0 R
- setComp(g, kk);; Y b4 F) D( Z6 ~" i
- db(g);3 T# K% n; Y; E8 _1 o6 _9 w
- t.upload();
5 E+ O% k8 s9 J* h& z - ctx.setDebugInfo("rt" ,Date.now() - ti);
3 @/ x. T V1 E7 k: Y% e - ctx.setDebugInfo("k", k);$ F! S T6 {8 h; l) f% X
- ctx.setDebugInfo("sm", kk);
6 U8 ^1 S% f% U - rt = Date.now() - ti;
( V6 b, v8 g. c1 L% P - Thread.sleep(ck(rt - 1000 / fps));
- u. Y, L& Z( q/ P - ctx.setDebugInfo("error", 0)
1 C5 ], e3 k6 v/ P5 c - } catch (e) {
. M1 `0 J+ c; Y( s2 } - ctx.setDebugInfo("error", e);
8 u& ?4 w, D! n! Q9 f; X- p% U - }" J5 c) \. a* v0 |# z
- }. T- `4 i$ ~9 D% r, F: a' l+ ^
- print("Thread end:" + id);
; S. a" t8 P! D8 m7 }$ z - }* C$ B9 N" J1 W7 K! d# U6 ~
- let th = new Thread(run, "qiehuan");
8 l0 u$ S) W! o' Y: U( r - th.start();$ |5 l/ E2 y- E6 _3 ?1 d1 y/ R2 J
- }. N7 `& }' _" K8 a0 j) L7 P
# X$ @9 U q/ A8 l) q/ L- function render(ctx, state, entity) {% L% z% C* e4 W9 V" A" C8 O) e
- state.f.tick();& h7 d& b0 V5 n. [. l
- }
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- function dispose(ctx, state, entity) {; ^$ Y. ^6 P, M6 E' u9 D. F
- print("Dispose");1 H# h/ u- P- f- H1 P: K. @4 N
- state.running = false;
( p* |+ `- Q; t - state.f.close();
+ A& Y) X! U Z* [& \ - }
5 L1 [; ?: ?+ j
" z+ F+ i) _, C* {+ k. Y! v2 f- function setComp(g, value) {# g0 k i* J5 v+ o+ P
- g.setComposite(AlphaComposite.SrcOver.derive(value));1 Q5 S$ ~8 O# s$ s, x
- }
复制代码
8 i7 X. G8 v L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 J$ i* M# o3 O3 x7 S
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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)* L: ?" z: K" q) c8 T& `
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