Differential D2181 Diff 7329 intern/cycles/kernel/shaders/node_normal_map.osl

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intern/cycles/kernel/shaders/node_normal_map.osl

Show All 20 Lines	shader node_normal_map(
float Strength = 1.0,		float Strength = 1.0,
color Color = color(0.5, 0.5, 1.0),		color Color = color(0.5, 0.5, 1.0),
string space = "tangent",		string space = "tangent",
string attr_name = "geom:tangent",		string attr_name = "geom:tangent",
string attr_sign_name = "geom:tangent_sign",		string attr_sign_name = "geom:tangent_sign",
output normal Normal = NormalIn)		output normal Normal = NormalIn)
{		{
color mcolor = 2.0 * color(Color[0] - 0.5, Color[1] - 0.5, Color[2] - 0.5);		color mcolor = 2.0 * color(Color[0] - 0.5, Color[1] - 0.5, Color[2] - 0.5);
		int is_backfacing = backfacing();

if (space == "tangent") {		if (space == "tangent") {
vector tangent;		vector tangent;
vector ninterp;		vector ninterp;
float tangent_sign;		float tangent_sign;
float is_smooth;		float is_smooth;

getattribute("geom:is_smooth", is_smooth);		getattribute("geom:is_smooth", is_smooth);
if (!is_smooth)		if (!is_smooth) {
ninterp = normalize(transform("world", "object", Ng));		ninterp = normalize(transform("world", "object", Ng));

		/* the normal is already inverted, which is too soon here */
		if (is_backfacing) {
		ninterp = -ninterp;
		}
		}

// get _unnormalized_ interpolated normal and tangent		// get _unnormalized_ interpolated normal and tangent
if (getattribute(attr_name, tangent) &&		if (getattribute(attr_name, tangent) &&
getattribute(attr_sign_name, tangent_sign) &&		getattribute(attr_sign_name, tangent_sign) &&
(!is_smooth \|\| getattribute("geom:N", ninterp)))		(!is_smooth \|\| getattribute("geom:N", ninterp)))
{		{
// apply normal map		// apply normal map
vector B = tangent_sign * cross(ninterp, tangent);		vector B = tangent_sign * cross(ninterp, tangent);
Normal = normalize(mcolor[0] * tangent + mcolor[1] * B + mcolor[2] * ninterp);		Normal = normalize(mcolor[0] * tangent + mcolor[1] * B + mcolor[2] * ninterp);
Show All 20 Lines	shader node_normal_map(
}		}
else if (space == "blender_world") {		else if (space == "blender_world") {
/* strange blender convention */		/* strange blender convention */
mcolor[1] = -mcolor[1];		mcolor[1] = -mcolor[1];
mcolor[2] = -mcolor[2];		mcolor[2] = -mcolor[2];

Normal = normalize(vector(mcolor));		Normal = normalize(vector(mcolor));
}		}

		/* invert normal for backfacing polygons */
		if (is_backfacing) {
		Normal = -Normal;
		}

if (Strength != 1.0)		if (Strength != 1.0)
Normal = normalize(NormalIn + (Normal - NormalIn) * max(Strength, 0.0));		Normal = normalize(NormalIn + (Normal - NormalIn) * max(Strength, 0.0));
}		}