fix bug

README.md

@@ -22,6 +22,15 @@ Final Image
 
 ![Final Image](img/finalimage.jpg "Final Image")
 
+### Front View Overscan
+
+The resolution is calculated so that the angle of view of each camera (front, back, top, bottom, and side) fits the final rendering resolution, but in this case the panorama is stretched and the front center is not resolved enough.
+
+The resolution can be increased by this amount only for the frontal rendering to compensate for the lack of resolution.
+
+The default setting of 25% almost eliminates the lack of resolution in the center of the image, but it results in excessive resolution on the periphery.
+This means that rendering will take more time.
+
 ### No Side Plane
 
 Generates panorama image **without rendering side views**.

renderer.py

@@ -23,6 +23,7 @@
 #define VMARGIN   %f
 #define EXTRUSION %f
 #define INTRUSION %f
+#define FB_SCALE  %f
 
 const float INVSIDEFRAC = 1 / SIDEFRAC;
 const float TBHTEXSCALE = 1 / (TBFRAC - INTRUSION);
@@ -350,10 +351,11 @@ def __init__(self, context, is_animation = False, folder = ''):
             self.no_top_bottom_images = True
         hmargin = 0.0 if self.no_side_images else margin
         vmargin = 0.0 if self.no_top_bottom_images else margin
+        fb_scale = 1.0 + max(0.0, props.frontViewOverscan / 100.0)
         # print(f"stichAngle {stitch_margin} margin:{margin} hmargin:{hmargin} vmargin:{vmargin} extrusion:{extrusion} intrusion:{intrusion}")
         # print(f"HTEXSCALE:{1 / (1 + 2 * extrusion + 2 * hmargin)} VTEXSCALE:{1 / (1 + 2 * extrusion + 2 * vmargin)}")
         frag_shader = \
-           (commdef % (fovfrac, sidefrac, tbfrac, h_fov, v_fov, hmargin, vmargin, extrusion, intrusion))\
+           (commdef % (fovfrac, sidefrac, tbfrac, h_fov, v_fov, hmargin, vmargin, extrusion, intrusion, fb_scale))\
          + (dome % domemodes[int(props.domeMethodEnum)] if is_dome else equi)\
          + fetch_setup\
          + ('' if self.no_side_images else fetch_sides)\
@@ -397,8 +399,7 @@ def __init__(self, context, is_animation = False, folder = ''):
         side_resolution = trans_resolution(base_resolution, sidefrac, 1, 0, vmargin)
         side_angle = pi/2 + ((2 * stitch_margin) if vmargin > 0.0 else 0.0)
         side_shift_scale = 1 / (1 + 2 * vmargin)
-        fb_scale = 1 + max(0, (props.frontViewOverscan / 100.0))
-        fb_resolution = trans_resolution(base_resolution, fb_scale, fb_scale, extrusion+hmargin, extrusion+vmargin)
+        fb_resolution = trans_resolution(base_resolution, fb_scale, fb_scale, (extrusion+hmargin)*fb_scale, (extrusion+vmargin)*fb_scale)
         fb_angle = (base_angle if no_side_plane else pi/2) + 2 * stitch_margin
         self.camera_settings = {
             'top': (0.0, 0.5*(tbfrac-1+intrusion), pi/2, tb_resolution[0], tb_resolution[1], aspect_ratio),