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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。
* {5 {# O& B! J+ f) C- importPackage (java.lang);
0 |( U0 E+ i/ J- E& ~ - importPackage (java.awt);
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' F7 F0 ^' {: E0 ~8 Z- include(Resources.id("mtrsteamloco:library/code/face.js"));
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7 T" a# i! g% o) a! |: P! L. P- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
9 a6 H, |0 J$ [- A: K6 C) R
6 U+ p+ |! J/ [4 b. r* P a- function getW(str, font) {
. F# H/ \% T7 g# Q' V/ N3 |$ a - let frc = Resources.getFontRenderContext();7 o, I, P+ T2 k, g7 B1 C
- bounds = font.getStringBounds(str, frc);4 R' L5 J U9 p2 @+ d' q
- return Math.ceil(bounds.getWidth());4 f/ f% q2 e" N+ @& x8 J" v5 o
- }( `! y h7 }" R+ K
- 4 [' e# l% j* J4 ~+ t3 j
- da = (g) => {//底图绘制# S1 _- y/ }/ m/ X2 s5 B4 g$ u
- g.setColor(Color.BLACK);9 {/ \2 U2 `/ A0 G0 i) @9 r7 E* q
- g.fillRect(0, 0, 400, 400);
/ m6 \# W+ y4 I+ P. [" o! X - }: m0 q0 ` ?6 m0 V/ {1 M
# y6 O) b. j% p: [" n8 ~0 [" p( k9 B- db = (g) => {//上层绘制
" `; @" X! h! h. ~. r4 W - g.setColor(Color.WHITE);
& d3 T+ o! `) M. R4 Y% S* x" q& O: c - g.fillRect(0, 0, 400, 400);
$ L& k" S0 M# O+ V6 V% z - g.setColor(Color.RED);' `* j4 \9 z+ x
- g.setFont(font0);
* ?: @$ A# T3 x! u' |. j4 P3 P, a5 F z - let str = "晴纱是男娘";6 G/ M4 c# \4 N( |/ U5 M* u, U
- let ww = 400;6 N6 Q- [5 }2 u3 \
- let w = getW(str, font0);& ]# `, [- }( L$ w
- g.drawString(str, ww / 2 - w / 2, 200);
# e t6 l% w8 u$ Z" w9 k2 e - }, T. m; E+ W/ V% O7 W
M# N' r8 j( F- G- const mat = new Matrices();
7 ]* L$ ^1 }+ `9 L$ _) T - mat.translate(0, 0.5, 0);8 t. ^9 L: }8 `7 c9 h9 G; _
- 5 w: q: q$ d" S1 L# N
- function create(ctx, state, entity) {9 R! i$ ^0 T. E! N$ C A; x. R, y
- let info = {
! Z7 B4 ]4 W1 v$ k' S - ctx: ctx,
# S0 f6 C& S5 }$ P9 [# D0 M. h - isTrain: false,- D* ]! ^4 q) X( r$ B5 i% d' l j
- matrices: [mat],! j0 O/ y7 ^6 F/ k4 }( t9 H
- texture: [400, 400],
+ x9 h2 J2 ^9 Z' j* ^ - model: {
4 U& Y0 `' T. d% u - renderType: "light",
6 E8 U' e* Y1 L$ t" `8 F - size: [1, 1],( t+ | j O- A( R4 w" x+ j( @
- uvSize: [1, 1]+ q8 V) e. v+ e, j. [
- }; P/ Q* Z5 _) g7 B* D
- }( J$ s3 K2 V5 @, y0 r
- let f = new Face(info);
( R0 v3 j ^. M' C% U! q - state.f = f;' e& x! B( F- w
- 5 w0 k7 \; C, S2 m% h
- let t = f.texture;1 i# @" N, P D( E
- let g = t.graphics;
* S0 f! F9 v' a# n. `" n! R - state.running = true;; d/ M; S! q8 T( `
- let fps = 24;# u- A0 P/ `7 d4 ^/ J$ `
- da(g);//绘制底图( S8 E3 e8 J9 F, K% x
- t.upload();
1 _0 C; p, X% ~ ]; h - let k = 0;# g) }* N7 r7 O
- let ti = Date.now();: Q" v! Y) `9 m5 v( v& E2 n- F
- let rt = 0;& T* V" B0 u% R. f# q+ f
- smooth = (k, v) => {// 平滑变化$ A- Y2 k" k/ e- I3 \
- if (v > k) return k;
* j& P( h- b' F9 z - if (k < 0) return 0;" T1 j- l, A* T2 L
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
- r. Z0 D3 E6 k3 G. z9 K5 Z/ Y - }3 F8 I7 ?) G! @+ J( h( F
- run = () => {// 新线程
+ L" A- P7 m% ?! g% k) e8 G - let id = Thread.currentThread().getId();8 `7 q8 U6 H$ K$ v2 c
- print("Thread start:" + id);
3 j; Y$ @* P( f - while (state.running) {, \: y* x* U: x9 S! H/ u: x. l$ M" }
- try {% w. d, [! ]" X( R/ h: C6 h
- k += (Date.now() - ti) / 1000 * 0.2;
# W# K. y1 y' j0 N; ]5 W9 L4 D - ti = Date.now();/ W3 p1 C, K' W* t2 e
- if (k > 1.5) {5 z* N( X4 p9 o0 m8 q) N
- k = 0;
* ]1 P7 i7 Q4 x. s2 e9 ~9 j1 b - }
, L0 R) \* \8 Q, ^- r - setComp(g, 1);
* ~: M# Z. _& b! g; m' J* } - da(g);6 A. k6 D% X1 \9 n. P
- let kk = smooth(1, k);//平滑切换透明度 V2 y! c8 s; ]% {; C/ b8 `0 [; w
- setComp(g, kk);
1 H. T0 ^: g! r7 R6 _6 h* ]: ?" z - db(g);
' z% J2 J. N6 ^% ~/ \ - t.upload();& U5 ]* D! M% M0 c0 g, ^
- ctx.setDebugInfo("rt" ,Date.now() - ti);
: ~% Y4 R, V+ W" F2 | z - ctx.setDebugInfo("k", k);8 O% S5 U, }/ s3 x0 Q
- ctx.setDebugInfo("sm", kk);
" [# f; I# l$ z9 M" c - rt = Date.now() - ti;
" A+ u- ~- I. Y9 H5 g; l* F% a - Thread.sleep(ck(rt - 1000 / fps));
9 z- ? K; F$ B - ctx.setDebugInfo("error", 0)
1 |, H8 h. _( L- I5 L - } catch (e) {1 G- F* W4 H6 z) ^6 z- _: R0 @" ?
- ctx.setDebugInfo("error", e); `* g- `. V3 L: q9 H0 Y4 `1 Z) O
- }
% p( @1 H) f% U# L4 U v* | - }
6 o9 I/ Q k0 M- _8 r - print("Thread end:" + id);
+ { P5 o u% [$ F& i! ^6 X# ~ _1 u - }1 a; v% l+ r1 W R1 l
- let th = new Thread(run, "qiehuan");
9 h1 u$ q. R: c: c& \ - th.start();
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- 8 v# J* u1 e3 d5 [
- function render(ctx, state, entity) {1 }9 y% b3 l0 G% \1 }# b+ u0 A
- state.f.tick();' {0 {% d, ?/ p: b) S
- }
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& l) x- C" C% c1 h6 S4 q- function dispose(ctx, state, entity) {+ }" a, _6 w% `- C; T" K I
- print("Dispose");( S2 v- q1 g% Q
- state.running = false;; o( N) A# S! |6 D! J7 z7 C
- state.f.close();
" B7 i) n1 C; r& M - }
% O# p# g4 v% x/ _9 ~: b7 z( ^ - 5 y9 n9 j% h; `! H; S+ f' ?
- function setComp(g, value) {
4 |; J2 p8 A$ i# d- v - g.setComposite(AlphaComposite.SrcOver.derive(value));
6 q; X2 l3 O5 o1 P i& c H' F$ t* ] - }
复制代码
$ G# p! J1 j) \3 o9 i! T7 H" o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。" W- W1 C, `* P, T, e" a$ s$ \7 {, D
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" t7 C3 M* f% m- ]+ f2 Q顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)! x8 Z! e6 H. }- f
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