SLA slices preview - wip 3

2 files changed, 11 insertions, 0 deletions

diff --git a/resources/shaders/gouraud.fs b/resources/shaders/gouraud.fs
index 9edc8fa76..f6116eec7 100644
--- a/resources/shaders/gouraud.fs
+++ b/resources/shaders/gouraud.fs
@@ -8,10 +8,18 @@ varying vec2 intensity;
 varying vec3 delta_box_min;
 varying vec3 delta_box_max;
 
+varying float world_z;
+
 uniform vec4 uniform_color;
 
+// x = min z, y = max z;
+uniform vec2 z_range;
+
 void main()
 {
+    if ((world_z < z_range.x) || (z_range.y < world_z))
+        discard;
+
     // if the fragment is outside the print volume -> use darker color
     vec3 color = (any(lessThan(delta_box_min, ZERO)) || any(greaterThan(delta_box_max, ZERO))) ? mix(uniform_color.rgb, ZERO, 0.3333) : uniform_color.rgb;
     gl_FragColor = vec4(vec3(intensity.y, intensity.y, intensity.y) + color * intensity.x, uniform_color.a);
diff --git a/resources/shaders/gouraud.vs b/resources/shaders/gouraud.vs
index ea7e46e79..84ae51391 100644
--- a/resources/shaders/gouraud.vs
+++ b/resources/shaders/gouraud.vs
@@ -34,6 +34,8 @@ varying vec2 intensity;
 varying vec3 delta_box_min;
 varying vec3 delta_box_max;
 
+varying float world_z;
+
 void main()
 {
     // First transform the normal into camera space and normalize the result.
@@ -67,4 +69,5 @@ void main()
     }    
 
     gl_Position = ftransform();
+    world_z = vec3(print_box.volume_world_matrix * gl_Vertex).z;
 }