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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。
: ~9 ?# c: K6 {( t6 k6 ^- importPackage (java.lang);( K( }2 _, R" R D' d5 b
- importPackage (java.awt);& c& t4 G, U) O9 M# M. M n+ H% e
* i9 O* A# m, z K+ t9 f- include(Resources.id("mtrsteamloco:library/code/face.js"));$ d0 s- C8 i4 S
- / T) x: L ^" _& x* L/ O; _: D
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);) Z. O# f9 n9 U* X& Q* E
- * }7 `* y ? ?) S$ F; H' v
- function getW(str, font) {
! e6 b+ e X; s! B - let frc = Resources.getFontRenderContext();; S6 H! K: H1 }3 l0 ^6 ]
- bounds = font.getStringBounds(str, frc);
4 {) v4 Q* x( g; A. V9 _ \2 e/ @1 ^1 _ - return Math.ceil(bounds.getWidth());
. u& H/ [6 c4 E, b - }" z' K4 T1 L" k6 J
0 o5 [8 o2 l. W3 Z+ q$ y- da = (g) => {//底图绘制; X6 u2 ]8 q: W: M, K* h! J4 |
- g.setColor(Color.BLACK);
9 [6 a: K- O/ ]+ i# U( m - g.fillRect(0, 0, 400, 400);2 q+ u1 D8 b6 R' k8 P1 `
- }
5 k! C7 X. @) v% D- }
& D: ]" R: C$ V4 Z% R+ O- db = (g) => {//上层绘制
$ s0 @ ?* B8 s. S6 N5 @/ i - g.setColor(Color.WHITE);! a" u' \" w, ]" z
- g.fillRect(0, 0, 400, 400);
6 A, r+ t: P+ m6 Q - g.setColor(Color.RED);2 i0 H& Z# Q! I# |1 v( z
- g.setFont(font0);
. P# H9 z |! R3 V: h - let str = "晴纱是男娘";
) U! B0 O2 D$ q9 B - let ww = 400;
" F/ j2 P% l" t - let w = getW(str, font0);
6 }' {+ K# F2 s* f9 ?' U - g.drawString(str, ww / 2 - w / 2, 200);6 t' l/ l. i( a5 z5 P- }9 F0 O& y
- }2 F. x! g' z [+ p K+ E# S% N
/ w1 ^5 H: _6 R* o# P9 y( {- const mat = new Matrices();
$ ]" y: m3 T5 i/ U - mat.translate(0, 0.5, 0);) T5 C3 M- {6 ?: ~4 c7 V0 p
- 1 S9 R* H* X& y! A- {+ s
- function create(ctx, state, entity) {- I: i# D4 ?$ `0 ]1 b6 V
- let info = {
. M; Q( }' Z4 Z! u# e4 H6 { - ctx: ctx,
`' Y& k3 v3 w1 i - isTrain: false,
) C( Q1 c8 A* t W. M2 z8 { - matrices: [mat],3 o |' [/ r9 N8 a, s; ]
- texture: [400, 400],
* p3 e0 Y& }3 n; R& [. K) s7 W3 u4 \ - model: {4 e1 Q3 M! h' E8 |! A$ B
- renderType: "light",
7 B* f2 X! M5 H3 z2 f/ h5 c( Y - size: [1, 1],
3 L0 r, [& C# z7 b: @- G- u - uvSize: [1, 1]: d5 w/ |' J. ~3 f
- }
4 m3 A7 G% _! y' { - }
/ r) t3 R3 H7 r5 s+ c, O - let f = new Face(info);
( [ \% T, m6 H) R; A - state.f = f;
$ H9 U% [! c' h, u, ` - $ ?# B& N$ B2 i! L! g
- let t = f.texture;
. {3 p5 e4 T+ \* M2 q$ I - let g = t.graphics;
( |3 x" Z( U0 n/ } - state.running = true;5 m% ^9 U1 K8 [" c$ j6 e$ |% m
- let fps = 24;
( U3 D# W# K1 ?/ @# C; i% r) y - da(g);//绘制底图
; s+ v+ ^6 y5 `1 D% ^5 X' g | - t.upload();9 W9 ^' Q. \% ~7 F* `9 v
- let k = 0;4 F. H) q2 Z; E: q+ [1 d
- let ti = Date.now();8 f; y, z1 b' Y u4 ]; @( M
- let rt = 0;
* k# c2 {2 [& A% E& _ - smooth = (k, v) => {// 平滑变化, q- J# g% {% u. ^% ^
- if (v > k) return k;
/ \ D$ r. l: g% t/ m0 F - if (k < 0) return 0;* a. J/ Q- f- S
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
2 d# K$ Y4 Y1 a - }
/ N7 c' _9 C& @# P. g - run = () => {// 新线程
5 q+ q. d6 u" W* N# ?& E - let id = Thread.currentThread().getId();
2 W) M5 b1 {0 c+ W) L3 { - print("Thread start:" + id);1 n2 X3 o. f5 @$ L1 |
- while (state.running) {: m% ]/ Q* `# E7 R6 M& B* y
- try {
; {% g/ m1 }, j( |; X7 b - k += (Date.now() - ti) / 1000 * 0.2;: b' h/ R9 I& `0 o% I" H6 E. l
- ti = Date.now();
9 F( B5 X; Y2 C+ r0 a2 ~$ t4 A - if (k > 1.5) {
b: p' @- @. l* W - k = 0;" ]7 W1 K" R9 g5 Y' i' V- K: u! m: s
- }
. d: K% A3 {! U# d6 |2 c - setComp(g, 1);; ^/ _. m( z- _; y
- da(g);% `/ a! M. G# m
- let kk = smooth(1, k);//平滑切换透明度
( j1 q. j1 h2 I' I+ t - setComp(g, kk);
+ y1 E2 }. @1 p# d' H6 N% Z - db(g);4 }% M) _- J+ ?( Z1 L
- t.upload();
( a7 g" m; P/ }$ H+ U* ]3 H - ctx.setDebugInfo("rt" ,Date.now() - ti);
; m( b k; P/ w+ z7 Z1 G - ctx.setDebugInfo("k", k);
& ]4 a$ P5 Z8 ]) q9 F7 b7 { - ctx.setDebugInfo("sm", kk);$ U9 {$ J) b; C4 X4 K5 M" Z$ n6 v
- rt = Date.now() - ti;
2 E) J" {; t1 ^9 [ - Thread.sleep(ck(rt - 1000 / fps));0 R4 ]% a6 g: }
- ctx.setDebugInfo("error", 0) H: z$ B, k' _ j4 I7 O
- } catch (e) {
2 i/ t6 {. N! J6 {& Z W9 B/ ?; @ - ctx.setDebugInfo("error", e);. U0 \- ^; B' l; d* Y! V
- }: a4 U+ p' Z- z9 @- S- x" B9 a& M3 B
- }
" z- r d, A$ y- D @% U - print("Thread end:" + id);0 V! K0 M# X) g9 F2 A
- }
% U. Q* d9 g; r8 s2 o - let th = new Thread(run, "qiehuan");
1 `: N: }: X+ j- _4 V. N) G - th.start();
5 m# m0 k, K# \; z9 U r" l. ~, V2 p - }3 f2 W+ v) o) K: J* }) k" r8 z4 v% f
" l0 Z, k, M) l7 Z( [- function render(ctx, state, entity) {
$ Z0 b( z% Z1 c) z C1 M, |/ k - state.f.tick();
! o P" T- X i7 m# I& G X - }
' }) j7 o7 L4 A: h- C a
2 ]; E1 F3 W7 r# W8 H. o- function dispose(ctx, state, entity) {! W. G. q8 r9 r
- print("Dispose");
/ L! _) m7 |1 S1 D - state.running = false;
0 V8 \4 Z0 i. C3 X+ W - state.f.close();* ]3 ^: C( j% ? L
- }3 r, U8 _5 Q& C+ v
- * M6 z: J; V7 n# \
- function setComp(g, value) {9 ]; S5 p J- s Z% H3 Y
- g.setComposite(AlphaComposite.SrcOver.derive(value));4 _+ @2 r: X2 ^7 R
- }
复制代码
- E+ v4 c4 [# O4 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。
" S+ y- T& Y$ C9 |$ `+ x5 T: q- _2 {( A2 p! J
# }( S2 J5 P7 z/ o* c/ [顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)# |3 }, h. o2 M' p: {" d# n
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