v0.1.0

1 files changed, 62 insertions, 0 deletions

diff --git a/bin/main.lua b/bin/main.lua
new file mode 100644
index 0000000..190c644
--- /dev/null
+++ b/bin/main.lua
@@ -0,0 +1,62 @@
+local shader = [[ 
+extern Image diffuse;
+extern number mx; 
+extern number my;
+
+vec4 effect(vec4 color, Image texture, vec2 texture_coords, vec2 pixel_coords)
+{
+   vec3 light_vec = vec3(mx ,my,1);
+   vec3 light_direction = light_vec - vec3(pixel_coords, 0);
+   float distance = length(light_direction);
+   light_direction = normalize(light_direction);
+
+   vec3 normal = Texel(texture, texture_coords).xyz;
+   normal.y = 1 - normal.y;
+   normal = normalize(mix(vec3(-1), vec3(1), normal));
+
+   //float attenuation = 1/(7e-5*pow(distance, 2));
+   float attenuation = 5000/pow(distance, 2);
+   //float attenuation = 1;
+
+   float diffuse_term = clamp(attenuation * dot(normal, light_direction), 0.0, 1.0);
+
+   vec3 dark_color = vec3(0.0, 0.0, 1);
+   //vec3 light_color = vec3(0.6, 0.6, 0.0);
+   vec3 light_color = vec3(0.8, 0.8, 0.0);
+   vec3 ambient = mix(dark_color, light_color, diffuse_term) * 0.20;
+
+   // the shaded cel has a light value of 0.5, the light cel has a light value of 1
+   float cel_diffuse_term = smoothstep(0.49, 0.52, diffuse_term)/2 + 0.5;
+   //float cel_diffuse_term = step(0.5, diffuse_term)/2 + 0.5;
+
+   return vec4((cel_diffuse_term * Texel(diffuse, texture_coords).rgb) + ambient, Texel(texture, texture_coords).a);
+   //return vec4(ambient+Texel(diffuse, texture_coords).rgb/100, Texel(texture, texture_coords).a);
+
+}
+]]
+
+local jg = jin.graphics
+local effect =  jg.Shader(shader) 
+local diffuse = jg.Image("treestump_diffuse.png")
+local img = jg.Image("treestump.png")
+
+jin.core.onEvent = function(e) 
+	if e.type == "quit" then 
+		jin.core.quit() 
+	end 
+end 
+
+jin.core.onUpdate = function() 
+	local mx, my = jin.mouse.position() 
+	my = 400 - my 
+	effect:send("number", "mx", mx)  
+	effect:send("number", "my", my)
+end 
+
+jin.core.onDraw = function() 
+	effect:send("Image", "diffuse", diffuse);
+	jg.use(effect)
+	img:setAnchor(16, 16)
+	jg.draw(img, 250, 200, 5, 5)
+	
+end