# HG changeset patch
# User Eleni Maria Stea <elene.mst@gmail.com>
# Date 1398612340 -10800
# Node ID 5ee081af59b8b4b834787c6a07bfcace4c9c4328
# Parent  4b6c952a83bd420aa9710fb96accd092f7adc76c
volume rendering

diff -r 4b6c952a83bd -r 5ee081af59b8 src/main.cc
--- a/src/main.cc	Sun Apr 27 18:13:44 2014 +0300
+++ b/src/main.cc	Sun Apr 27 18:25:40 2014 +0300
@@ -53,6 +53,7 @@
 
 static int use_orig_vol_res = 1;
 static int vol_res[3]; // volume sampling resolution x/y/z
+static float bound_scale = 1.42;
 
 static GLUI *ui;
 
@@ -124,6 +125,8 @@
 	vol_res[1] = vol->get_slice(0)->get_height();
 	vol_res[2] = vol->get_slice_count();
 
+	num_poly = std::max(vol_res[0], std::max(vol_res[1], vol_res[2])) * bound_scale;
+
 	if(!(ui = create_ui())) {
 		return false;
 	}
@@ -296,13 +299,9 @@
 	if(tmax_loc != -1)
 		glUniform1f(tmax_loc, std::max(thres, thres2));
 
-	const Image *img = vol->get_slice(0);
-	int res_x = img->get_width();
-	int res_y = img->get_height();
-	int res_z = vol->get_slice_count();
 	int res_loc = glGetUniformLocation(sprog_vol, "res");
 	if(res_loc != -1)
-		glUniform3f(res_loc, (float)res_x, (float)res_y, (float)res_z);
+		glUniform3f(res_loc, (float)vol_res[0], (float)vol_res[1], (float)vol_res[2]);
 
 	glDisable(GL_DEPTH_TEST);
 	glBindTexture(GL_TEXTURE_3D, vol->get_texture());
@@ -314,10 +313,10 @@
 		float tex_z = (float)i / (float)num_poly;
 		float z = 2 * tex_z - 1;
 
-		glTexCoord3f(0, 0, tex_z); glVertex3f(-2, -2, z * 2);
-		glTexCoord3f(0, 1, tex_z); glVertex3f(-2, 2, z * 2);
-		glTexCoord3f(1, 1, tex_z); glVertex3f(2, 2, z * 2);
-		glTexCoord3f(1, 0, tex_z); glVertex3f(2, -2, z * 2);
+		glTexCoord3f(0, 0, tex_z); glVertex3f(-bound_scale, -bound_scale, z * bound_scale);
+		glTexCoord3f(0, 1, tex_z); glVertex3f(-bound_scale, bound_scale, z * bound_scale);
+		glTexCoord3f(1, 1, tex_z); glVertex3f(bound_scale, bound_scale, z * bound_scale);
+		glTexCoord3f(1, 0, tex_z); glVertex3f(bound_scale, -bound_scale, z * bound_scale);
 	}
 	glEnd();
 	glDisable(GL_BLEND);