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uniform float wireStepParam;
uniform float wireOpacity;
uniform bool useColoring;
uniform bool isTransform;
uniform bool isObjectColor;
uniform bool isRandomColor;
uniform bool isHair;
uniform vec4 hairDupliMatrix[4];
in vec3 pos;
in vec3 nor;
in float wd; /* wiredata */
flat out vec2 edgeStart;
#ifndef SELECT_EDGES
out vec4 finalColor;
noperspective out vec2 edgePos;
#endif
float get_edge_sharpness(float wd)
{
return ((wd == 0.0) ? -1.5 : wd) + wireStepParam;
}
void wire_color_get(out vec3 rim_col, out vec3 wire_col)
{
int flag = int(abs(ObjectInfo.w));
bool is_selected = (flag & DRW_BASE_SELECTED) != 0;
bool is_from_dupli = (flag & DRW_BASE_FROM_DUPLI) != 0;
bool is_from_set = (flag & DRW_BASE_FROM_SET) != 0;
bool is_active = (flag & DRW_BASE_ACTIVE) != 0;
if (is_from_set) {
rim_col = colorDupli.rgb;
wire_col = colorDupli.rgb;
}
else if (is_from_dupli) {
if (is_selected) {
if (isTransform) {
rim_col = colorTransform.rgb;
}
else {
rim_col = colorDupliSelect.rgb;
}
}
else {
rim_col = colorDupli.rgb;
}
wire_col = colorDupli.rgb;
}
else if (is_selected && useColoring) {
if (isTransform) {
rim_col = colorTransform.rgb;
}
else if (is_active) {
rim_col = colorActive.rgb;
}
else {
rim_col = colorSelect.rgb;
}
wire_col = colorWire.rgb;
}
else {
rim_col = colorWire.rgb;
wire_col = colorBackground.rgb;
}
}
vec3 hsv_to_rgb(vec3 hsv)
{
vec3 nrgb = abs(hsv.x * 6.0 - vec3(3.0, 2.0, 4.0)) * vec3(1, -1, -1) + vec3(-1, 2, 2);
nrgb = clamp(nrgb, 0.0, 1.0);
return ((nrgb - 1.0) * hsv.y + 1.0) * hsv.z;
}
void wire_object_color_get(out vec3 rim_col, out vec3 wire_col)
{
int flag = int(abs(ObjectInfo.w));
bool is_selected = (flag & DRW_BASE_SELECTED) != 0;
if (isObjectColor) {
rim_col = wire_col = ObjectColor.rgb * 0.5;
}
else {
float hue = ObjectInfo.z;
vec3 hsv = vec3(hue, 0.75, 0.8);
rim_col = wire_col = hsv_to_rgb(hsv);
}
if (is_selected && useColoring) {
/* "Normalize" color. */
wire_col += 1e-4; /* Avoid division by 0. */
float brightness = max(wire_col.x, max(wire_col.y, wire_col.z));
wire_col *= 0.5 / brightness;
rim_col += 0.75;
}
else {
rim_col *= 0.5;
wire_col += 0.5;
}
}
void main()
{
bool no_attr = all(equal(nor, vec3(0)));
vec3 wnor = no_attr ? ViewMatrixInverse[2].xyz : normalize(normal_object_to_world(nor));
vec3 wpos = point_object_to_world(pos);
if (isHair) {
mat4 obmat = mat4(
hairDupliMatrix[0], hairDupliMatrix[1], hairDupliMatrix[2], hairDupliMatrix[3]);
wpos = (obmat * vec4(pos, 1.0)).xyz;
wnor = -normalize(mat3(obmat) * nor);
}
bool is_persp = (ProjectionMatrix[3][3] == 0.0);
vec3 V = (is_persp) ? normalize(ViewMatrixInverse[3].xyz - wpos) : ViewMatrixInverse[2].xyz;
float facing = dot(wnor, V);
gl_Position = point_world_to_ndc(wpos);
#ifndef CUSTOM_DEPTH_BIAS
float facing_ratio = clamp(1.0 - facing * facing, 0.0, 1.0);
float flip = sign(facing); /* Flip when not facing the normal (i.e.: backfacing). */
float curvature = (1.0 - wd * 0.75); /* Avoid making things worse for curvy areas. */
vec3 wofs = wnor * (facing_ratio * curvature * flip);
wofs = normal_world_to_view(wofs);
/* Push vertex half a pixel (maximum) in normal direction. */
gl_Position.xy += wofs.xy * sizeViewportInv.xy * gl_Position.w;
/* Push the vertex towards the camera. Helps a bit. */
gl_Position.z -= facing_ratio * curvature * 1.0e-6 * gl_Position.w;
#endif
/* Convert to screen position [0..sizeVp]. */
edgeStart = ((gl_Position.xy / gl_Position.w) * 0.5 + 0.5) * sizeViewport.xy;
#ifndef SELECT_EDGES
edgePos = edgeStart;
vec3 rim_col, wire_col;
if (isObjectColor || isRandomColor) {
wire_object_color_get(rim_col, wire_col);
}
else {
wire_color_get(rim_col, wire_col);
}
facing = clamp(abs(facing), 0.0, 1.0);
/* Do interpolation in a non-linear space to have a better visual result. */
rim_col = pow(rim_col, vec3(1.0 / 2.2));
wire_col = pow(wire_col, vec3(1.0 / 2.2));
vec3 final_front_col = mix(rim_col, wire_col, 0.35);
finalColor.rgb = mix(rim_col, final_front_col, facing);
finalColor.rgb = pow(finalColor.rgb, vec3(2.2));
finalColor.a = wireOpacity;
finalColor.rgb *= wireOpacity;
#endif
/* Cull flat edges below threshold. */
if (!no_attr && (get_edge_sharpness(wd) < 0.0)) {
edgeStart = vec2(-1.0);
}
#ifdef SELECT_EDGES
/* HACK: to avoid losing sub-pixel object in selections, we add a bit of randomness to the
* wire to at least create one fragment that will pass the occlusion query. */
gl_Position.xy += sizeViewportInv.xy * gl_Position.w * ((gl_VertexID % 2 == 0) ? -1.0 : 1.0);
#endif
#ifdef USE_WORLD_CLIP_PLANES
world_clip_planes_calc_clip_distance(wpos);
#endif
}
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