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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。8 @6 b0 Z) x3 B* d, j) [- [0 S
- importPackage (java.lang);
6 P/ Q4 Y- G. o - importPackage (java.awt);
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& m+ Z0 O+ R( K8 E- Q4 z$ o- include(Resources.id("mtrsteamloco:library/code/face.js"));* e2 h+ h: T2 c
& [. C' Y8 A5 ?- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
& N" B; N1 d5 R# J" U - / }9 Y1 ?$ `; r$ |2 U( p+ z
- function getW(str, font) {9 q% f6 Z. \2 e. s9 `- i
- let frc = Resources.getFontRenderContext();* U9 Q d# H# y
- bounds = font.getStringBounds(str, frc);
I) z4 G X- T - return Math.ceil(bounds.getWidth());
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- ' R8 n1 X2 M, h( j9 x0 T2 P; A
- da = (g) => {//底图绘制9 S; v* E. R+ B7 S1 L" ]
- g.setColor(Color.BLACK);9 R8 E) N& U8 G8 [# i* _5 D
- g.fillRect(0, 0, 400, 400);
E% p" m! x; D: O - }
$ M5 \. Y, M/ z! J) n- { - 3 l1 H: Q$ V8 f4 E) j/ J
- db = (g) => {//上层绘制/ } V; E. W5 S7 v( ?6 o, v* b
- g.setColor(Color.WHITE);
6 f* `. M" h) n8 h s - g.fillRect(0, 0, 400, 400);' \( \' I) d- P( G/ V
- g.setColor(Color.RED);
$ u0 J' {- h: _) r - g.setFont(font0);
/ z1 L3 v4 a, D/ E/ A5 W - let str = "晴纱是男娘";2 H! R0 ^! M# i/ |; d
- let ww = 400;" g6 S; x2 K% [ [
- let w = getW(str, font0);* d/ d1 _& l. u0 @
- g.drawString(str, ww / 2 - w / 2, 200);
2 T m( G5 p4 U8 ^ P4 M6 p7 H$ I - }: U, d1 U( J3 ?2 |0 P) _
6 q6 Z5 m6 N6 e* P5 z- P/ z- const mat = new Matrices();
. V, f7 a( i5 Z6 Q9 D - mat.translate(0, 0.5, 0);% F8 B. y$ |# v
6 z9 X2 d6 e- M( B- H- function create(ctx, state, entity) {
) u8 F' N7 }- I* T* Y! S! l* } - let info = {2 Z% G/ B! i7 J
- ctx: ctx,
+ Y7 |: C9 h _9 b7 ~2 ] - isTrain: false,' d3 |. V$ B9 m V0 i" t
- matrices: [mat],1 U8 v4 F- w- B5 G& }8 D. w% y
- texture: [400, 400],
5 ^6 r+ q! Y' U& i - model: {; M, E5 J/ M4 \+ ?$ i
- renderType: "light",1 e2 I R4 c! X# E0 x5 i
- size: [1, 1],
5 X5 P" t# [, c; ~ - uvSize: [1, 1]
- j. {: [9 U! Q9 _9 C" ~, W - }' S% U* I8 |* X
- }
9 U D2 B( x' P1 _* S2 J) _0 O - let f = new Face(info);
" |+ X3 X( f! r. l" M7 s: W - state.f = f;% c4 g. ^- Y9 x- t6 l5 S4 C* S+ W
- . k( V* W2 N* o) x' h6 k
- let t = f.texture;3 w: m, @% |% g( a4 G; `, O3 S1 a
- let g = t.graphics;: }6 G5 g, K! f2 U) p- G: d( U. S
- state.running = true;
8 D& }/ l1 ^, l - let fps = 24;5 ?' d1 `. B# E% v! [5 K
- da(g);//绘制底图( }9 y5 D0 k% X" X5 M
- t.upload();$ X8 i0 D, q& W8 x7 Y7 e
- let k = 0;/ x9 I$ N3 R5 h/ M! E% o; Z
- let ti = Date.now();
5 U. X- D( J& @/ { - let rt = 0;
' X( ]7 F/ I: M - smooth = (k, v) => {// 平滑变化' Y, |' g3 F( Z" [& f
- if (v > k) return k;" Y- z5 b3 `: O8 I0 D: Z2 c- ?
- if (k < 0) return 0;! n7 U, r; k' _) W
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;& w* i1 R- d) |( Y: `& r$ z/ V5 [2 M
- }
. P& w- o4 n: X - run = () => {// 新线程( u6 G% U: R$ W
- let id = Thread.currentThread().getId();
0 u2 y; C! U% L - print("Thread start:" + id);/ h) L: u* t" n2 Y5 L9 [5 Q$ x
- while (state.running) {! I& _8 x. z% i6 X# M
- try {. @2 |5 S9 w- G
- k += (Date.now() - ti) / 1000 * 0.2;& c7 R, o' `, ~: i8 l* E3 y
- ti = Date.now();' i. m) ^! M! y
- if (k > 1.5) {
. H; `) M+ K/ r7 G - k = 0;5 @! m) O: ?- j3 `5 t6 f" M
- }' ]7 K+ Y! j' L$ B) m
- setComp(g, 1);7 a( Y& D1 { q$ R& j9 C
- da(g);
. W1 K8 A0 {/ T# O4 [ - let kk = smooth(1, k);//平滑切换透明度3 o* Q& Y3 I0 O' r3 T
- setComp(g, kk);/ y) f; B8 d' O
- db(g);
J: f( |! ]- A - t.upload();' y# K# ]' g8 G- y
- ctx.setDebugInfo("rt" ,Date.now() - ti);( L/ Q9 h( t5 \
- ctx.setDebugInfo("k", k);$ g8 {" W5 j5 A0 y1 V g
- ctx.setDebugInfo("sm", kk);
4 @/ \. G+ d% R$ e - rt = Date.now() - ti;0 G2 Q( N/ ? c" j
- Thread.sleep(ck(rt - 1000 / fps));' `+ V5 r: o) r
- ctx.setDebugInfo("error", 0)0 k/ }6 f* _; k' ]+ B
- } catch (e) {
. N7 V8 s! f8 z u: n - ctx.setDebugInfo("error", e);
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- }' K3 q" u5 z5 D' z4 n( c
- print("Thread end:" + id);
- O* \7 d' x. F/ L* W7 @0 h - }: e" o7 u5 }+ |" T/ h
- let th = new Thread(run, "qiehuan");
" d8 `1 z' n' ^* Q, D V5 V0 n - th.start();
) x9 ^2 ^! i0 y3 B& n9 O - }
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" k9 a8 E9 ]* {8 ~7 P ^0 L* L- function render(ctx, state, entity) {
, k8 Z Y$ \- o+ v3 c# O - state.f.tick();
8 W% U, E5 L2 W3 g% J - }
) B: b) f8 L3 O& N
7 K6 d0 e% H8 v1 V- function dispose(ctx, state, entity) {
|/ O" p& `+ ~8 f8 X3 E5 r - print("Dispose");
9 o' _2 P: C6 n2 T$ s5 x) V - state.running = false;
1 I' |- m; m" P# f* v' H0 U - state.f.close();
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- 3 B' a4 E* f" B- w" X3 i
- function setComp(g, value) {) w# l. ~9 @% U. j9 W4 q+ g
- g.setComposite(AlphaComposite.SrcOver.derive(value));
) M) p5 R$ M8 ^* c' b" n - }
复制代码
- J, E! L' q9 Z5 ^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。* j: C/ Q) a# o* s6 z/ p+ A6 {
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' t; P3 |7 m8 ?6 F1 |6 v+ l顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)9 F+ U' t# N0 m2 F e; {) N* g
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