76 lines
2.6 KiB
Python
76 lines
2.6 KiB
Python
from .geometry import clamp
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class Camera:
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def __init__(self, viewWidth, viewHeight, worldWidth, worldHeight):
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self.viewWidth = viewWidth
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self.viewHeight = viewHeight
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self.worldWidth = worldWidth
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self.worldHeight = worldHeight
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self.x = 0.0
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self.y = 0.0
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self.deadzoneWidth = viewWidth * 0.28
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self.deadzoneHeight = viewHeight * 0.32
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self.lerp = 0.18
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self.shakeFrames = 0
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self.shakeMagnitude = 0.0
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def setBounds(self, worldWidth, worldHeight):
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self.worldWidth = worldWidth
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self.worldHeight = worldHeight
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def focusOn(self, targetX, targetY):
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self.x = targetX - self.viewWidth * 0.5
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self.y = targetY - self.viewHeight * 0.5
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self.clampToWorld()
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def clampToWorld(self):
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maxX = max(0.0, self.worldWidth - self.viewWidth)
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maxY = max(0.0, self.worldHeight - self.viewHeight)
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self.x = clamp(self.x, 0.0, maxX)
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self.y = clamp(self.y, 0.0, maxY)
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def addShake(self, frames, magnitude):
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self.shakeFrames = max(self.shakeFrames, frames)
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self.shakeMagnitude = max(self.shakeMagnitude, magnitude)
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def update(self, targetX, targetY):
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centerX = self.x + self.viewWidth * 0.5
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centerY = self.y + self.viewHeight * 0.5
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halfDeadX = self.deadzoneWidth * 0.5
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halfDeadY = self.deadzoneHeight * 0.5
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desiredX = self.x
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if targetX < centerX - halfDeadX:
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desiredX = self.x + (targetX - (centerX - halfDeadX))
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elif targetX > centerX + halfDeadX:
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desiredX = self.x + (targetX - (centerX + halfDeadX))
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desiredY = self.y
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if targetY < centerY - halfDeadY:
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desiredY = self.y + (targetY - (centerY - halfDeadY))
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elif targetY > centerY + halfDeadY:
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desiredY = self.y + (targetY - (centerY + halfDeadY))
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self.x += (desiredX - self.x) * self.lerp
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self.y += (desiredY - self.y) * self.lerp
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self.clampToWorld()
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if self.shakeFrames > 0:
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self.shakeFrames -= 1
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if self.shakeFrames == 0:
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self.shakeMagnitude = 0.0
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def offset(self):
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offsetX = self.x
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offsetY = self.y
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if self.shakeFrames > 0:
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wobble = self.shakeMagnitude * (1.0 if self.shakeFrames % 2 == 0 else -1.0)
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offsetX += wobble
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offsetY += wobble * 0.5
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return int(offsetX), int(offsetY)
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def worldToScreen(self, worldX, worldY):
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offsetX, offsetY = self.offset()
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return worldX - offsetX, worldY - offsetY
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