*屏幕特效(post processing)

1 files changed, 64 insertions, 0 deletions

diff --git a/bin/game/main.lua b/bin/game/main.lua
index ce5b62c..3ce17a0 100644
--- a/bin/game/main.lua
+++ b/bin/game/main.lua
@@ -20,7 +20,11 @@ end
 local particle_sprites = {}
 local Pi = 3.1415
 local sinShader = nil
+local screen = nil
+local pp = nil
+local pixel = nil 
 function jin.core.onLoad()
+	screen = jin.graphics.newCanvas(jin.graphics.getSize())
 	-- bitmap = jin.graphics.newBitmap(200, 200, function(w, h, x, y)
 		-- return {255*math.sin(x/w),255 - 255,255*math.cos(y/w),255}
 	-- end)
@@ -103,6 +107,54 @@ function jin.core.onLoad()
 		}
 		#END_FRAGMENT_SHADER
     ]]
+	
+	pp = jin.graphics.newShader[[ 
+		#VERTEX_SHADER
+		Vertex vert(Vertex v)
+		{
+			return v;
+		}
+		#END_VERTEX_SHADER
+		#FRAGMENT_SHADER
+		Color frag(Color col, Texture tex, Vertex v)
+		{
+			v.uv.x += sin(v.uv.y * 4 * 2 * 3.14 + jin_Time.x) / (10 + sin(jin_Time.x) * 10);
+			return texel(tex, v.uv);
+		}
+		#END_FRAGMENT_SHADER
+	]]
+	
+	pixel = jin.graphics.newShader[[ 
+		#VERTEX_SHADER
+		Vertex vert(Vertex v)
+		{
+			return v;
+		}
+		#END_VERTEX_SHADER
+		#FRAGMENT_SHADER
+		Color frag(Color col, Texture tex, Vertex v)
+		{
+			// config 
+			float pixel_w = 10.0;
+			float pixel_h = 10.0;
+			
+			vec2 uv = v.uv;
+			vec3 tc = vec3(1.0, 0.0, 0.0);
+			if(uv.x < abs(sin(jin_Time.x)))
+			{
+				float dx = pixel_w*(1.0/jin_RenderTargetSize.x);
+				float dy = pixel_h*(1.0/jin_RenderTargetSize.y);
+				vec2 coord = vec2(dx*floor(uv.x/dx),dy*floor(uv.y/dy));
+				tc = texel(tex, coord).rgb;
+			}
+			else 
+			{
+				tc = texel(tex, uv).rgb;
+			}
+			return vec4(tc, 1.0);
+		}
+		#END_FRAGMENT_SHADER
+	]] 
     
     jin.log.info("test")
     
@@ -127,6 +179,11 @@ function jin.core.onEvent(e)
     if e.type == "Quit" then 
         jin.core.stop()
     end
+	if e.type == "MouseButtonDown" then 
+		if e.button == "Left" then 
+			ps:setPosition(e.x, e.y)
+		end 
+	end 
 end
 
 local t = 0
@@ -142,6 +199,8 @@ function jin.core.onUpdate(dt)
 end
 
 function jin.core.onDraw()
+	jin.graphics.bindCanvas(screen)
+	jin.graphics.clear()
     jin.graphics.useShader(jin.graphics.Shaders.Shape)
     jin.graphics.setColor(255, 0, 255, 255)
     jin.graphics.rect(jin.graphics.RenderMode.FILL, 30, 50, 100, 200)
@@ -166,4 +225,9 @@ function jin.core.onDraw()
     jin.graphics.unuseShader()
     jin.graphics.setColor(255, 255, 255, 255)
     jin.graphics.print(jin.graphics.getStatsStr(), 450, 10)
+	
+	jin.graphics.unbindCanvas(screen)
+	jin.graphics.useShader(pixel)
+	jin.graphics.draw(screen, 0, 0)
+	jin.graphics.unuseShader()
 end
\ No newline at end of file