phong.lua
fbe15d5301a9celluloVR

phong.lua
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			return function()
			return lovr.graphics.newShader([[
			out vec3 lightDirection;
			out vec3 normalDirection;

			uniform vec3 lightPosition;

			vec4 position(mat4 projection, mat4 transform, vec4 vertex) {
			vec4 vVertex = transform * vec4(lovrPosition, 1.);
			vec4 vLight = lovrView * vec4(lightPosition, 1.);

			lightDirection = normalize(vec3(vLight - vVertex));
			normalDirection = normalize(lovrNormalMatrix * lovrNormal);

			return projection * transform * vertex;
			}
			]], [[
			in vec3 lightDirection;
			in vec3 normalDirection;

			vec3 cAmbient = vec3(.2);
			vec3 cDiffuse = vec3(.8);
			vec3 cSpecular = vec3(.2);

			vec4 color(vec4 graphicsColor, sampler2D image, vec2 uv) {
			float diffuse = max(dot(normalDirection, lightDirection), 0.);
			float specular = 0.;

			if (diffuse > 0.) {
			vec3 r = reflect(lightDirection, normalDirection);
			vec3 viewDirection = normalize(-vec3(gl_FragCoord));

			float specularAngle = max(dot(r, viewDirection), 0.);
			specular = pow(specularAngle, 5.);
			}

			vec3 cFinal = vec3(diffuse) * cDiffuse + vec3(specular) * cSpecular;
			cFinal = clamp(cFinal, cAmbient, vec3(1.));
			return vec4(cFinal, 1.) * graphicsColor * texture(image, uv);
			}
			]])
			end