69 lines
2.0 KiB
Plaintext
69 lines
2.0 KiB
Plaintext
import vpsdk.window as window
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import vpsdk.process as process
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import vpsdk.vpui as vpui
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import string
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from stdint import *
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import gfx
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define SCENE_W = 640
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define SCENE_H = 360
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_zbuf_mem: [SCENE_W * SCENE_H * 8]uint8 = []
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_fb_mem: [SCENE_W * SCENE_H]uint32 = []
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_root_ptr: vpui.Tk*
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_canvas_ptr: vpui.FBCanvas*
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_s3d_ptr: gfx.Scene3D*
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_time_val: float = float(0.0)
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# 时间回绕周期 = 4π：Render 里 time*1 / time*2 / time*1.5 的 sin/cos 参数整体平移 2π 的整数倍
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# ⇒ 动画严格连续；同时让相位半径永远很小，避免 float32 精度随运行时间退化
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# （x 变大后相邻采样点的相位差被量化 ⇒ 曲线塌成一条平线、热力图颜色失去层次）。
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define TIME_WRAP = float(12.566370614359172)
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def _render_thread(arg: t.CPtr):
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global _time_val
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root: vpui.Tk* = _root_ptr
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canvas: vpui.FBCanvas* = _canvas_ptr
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s3d: gfx.Scene3D* = _s3d_ptr
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while root.winfo_exists():
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s3d.Render(_time_val)
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_time_val += float(0.02)
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if _time_val >= TIME_WRAP: _time_val = _time_val - TIME_WRAP
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root.update()
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process.yield_cpu()
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@__attribute__(section(".text.startup"), aligned(16))
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export def _start() -> int:
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root: vpui.Tk = vpui.Tk()
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root.title("3D Scene")
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root.set_style(window.STYLE_WIN11)
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root.bg_color = uint32(0x0F0F19)
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master: vpui.Tk* = &root
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canvas: vpui.FBCanvas = vpui.FBCanvas(master, SCENE_W, SCENE_H)
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root.pack(0, vpui.PACK_TOP, vpui.FILL_BOTH, 1, 0, 0)
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zbuf: float* = &_zbuf_mem
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string.memset(zbuf, 0, SCENE_W * SCENE_H * 8)
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fb: UINT32PTR = &_fb_mem
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string.memset(fb, 0, SCENE_W * SCENE_H * 4)
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canvas.set_fb(fb, SCENE_W, SCENE_H)
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s3d: gfx.Scene3D = gfx.Scene3D(fb, zbuf, SCENE_W, SCENE_H)
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root.geometry(100, 30, SCENE_W, SCENE_H + 32)
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global _root_ptr, _canvas_ptr, _s3d_ptr
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_root_ptr = &root
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_canvas_ptr = &canvas
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_s3d_ptr = &s3d
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process.thread_create(_render_thread, None)
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root.mainloop()
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process.exit(0)
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return 0
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