diff --git a/lib/body.lua b/lib/body.lua index 8d1ca54..84fe133 100644 --- a/lib/body.lua +++ b/lib/body.lua @@ -460,63 +460,20 @@ function body:drawMaterial() end end -function body:drawCalculatedShadow(light) +function body:drawShadow(light) + love.graphics.setColor(self.red, self.green, self.blue, self.alpha) if self.shadowType == "rectangle" or self.shadowType == "polygon" then - return self:calculatePolyShadow(light) + self:drawPolyShadow(light) elseif self.shadowType == "circle" then - return self:calculateCircleShadow(light) + self:drawCircleShadow(light) elseif self.shadowType == "image" and self.img then - local length = 1.0 - local shadowRotation = math.atan2((self.x) - light.x, (self.y + self.oy) - light.y) - - self.shadowVert = { - { - math.sin(shadowRotation) * self.imgHeight * length, - (length * math.cos(shadowRotation) + 1.0) * self.imgHeight + (math.cos(shadowRotation) + 1.0) * self.shadowY, - 0, 0, - self.red, - self.green, - self.blue, - self.alpha * self.fadeStrength * 255 - }, - { - self.imgWidth + math.sin(shadowRotation) * self.imgHeight * length, - (length * math.cos(shadowRotation) + 1.0) * self.imgHeight + (math.cos(shadowRotation) + 1.0) * self.shadowY, - 1, 0, - self.red, - self.green, - self.blue, - self.alpha * self.fadeStrength * 255 - }, - { - self.imgWidth, - self.imgHeight + (math.cos(shadowRotation) + 1.0) * self.shadowY, - 1, 1, - self.red, - self.green, - self.blue, - self.alpha * 255 - }, - { - 0, - self.imgHeight + (math.cos(shadowRotation) + 1.0) * self.shadowY, - 0, 1, - self.red, - self.green, - self.blue, - self.alpha * 255 - } - } - - love.graphics.setColor(self.red, self.green, self.blue, self.alpha) - self.shadowMesh:setVertices(self.shadowVert) - love.graphics.draw(self.shadowMesh, self.x - self.ox, self.y - self.oy, 0, s, s) + self:drawImageShadow(light) end end --using shadow point calculations from this article --http://web.cs.wpi.edu/~matt/courses/cs563/talks/shadow/shadow.html -function body:calculatePolyShadow(light) +function body:drawPolyShadow(light) if self.castsNoShadow or (self.zheight - light.z) > 0 then return nil end @@ -565,14 +522,13 @@ function body:calculatePolyShadow(light) end end if #curShadowGeometry >= 6 then - love.graphics.setColor(self.red, self.green, self.blue, self.alpha) love.graphics.polygon("fill", unpack(curShadowGeometry)) end end --using shadow point calculations from this article --http://web.cs.wpi.edu/~matt/courses/cs563/talks/shadow/shadow.html -function body:calculateCircleShadow(light) +function body:drawCircleShadow(light) if self.castsNoShadow or (self.zheight - light.z) > 0 then return nil end @@ -608,7 +564,6 @@ function body:calculateCircleShadow(light) local distance1 = math.sqrt(math.pow(light.x - self.x, 2) + math.pow(light.y - self.y, 2)) / 2 local distance2 = math.sqrt(math.pow(light.x - cx, 2) + math.pow(light.y - cy, 2)) / 2 - love.graphics.setColor(self.red, self.green, self.blue, self.alpha) love.graphics.polygon("fill", curShadowGeometry) if distance1 <= self.radius then @@ -622,4 +577,26 @@ function body:calculateCircleShadow(light) end end +function body:drawImageShadow(light) + local height_diff = (light.z - self.zheight) + if height_diff <= 0.1 then -- prevent shadows from leaving thier person like peter pan. + height_diff = 0.1 + end + + local length = 1.0 / height_diff + local shadowRotation = math.atan2((self.x) - light.x, (self.y + self.oy) - light.y) + local shadowStartY = self.imgHeight + (math.cos(shadowRotation) + 1.0) * self.shadowY + local shadowX = math.sin(shadowRotation) * self.imgHeight * length + local shadowY = (length * math.cos(shadowRotation) + 1.0) * shadowStartY + + self.shadowMesh:setVertices({ + {shadowX, shadowY, 0, 0, self.red, self.green, self.blue, self.alpha}, + {shadowX + self.imgWidth, shadowY, 1, 0, self.red, self.green, self.blue, self.alpha}, + {self.imgWidth, shadowStartY, 1, 1, self.red, self.green, self.blue, self.alpha}, + {0, shadowStartY, 0, 1, self.red, self.green, self.blue, self.alpha} + }) + + love.graphics.draw(self.shadowMesh, self.x - self.ox, self.y - self.oy, 0, s, s) +end + return body diff --git a/lib/init.lua b/lib/init.lua index e9347fc..6bfd69a 100644 --- a/lib/init.lua +++ b/lib/init.lua @@ -137,7 +137,7 @@ function light_world:drawNormalShading(l,t,w,h,s) self.shadowMap:clear() util.drawto(self.shadowMap, l, t, s, function() for k = 1, #self.body do - self.body[k]:drawCalculatedShadow(self.lights[i]) + self.body[k]:drawShadow(self.lights[i]) end end) self.lights[i]:drawNormalShading(l,t,w,h,s, self.normalMap, self.shadowMap, self.normal2)