makes geometry shader an option

shaders/shader.geom

@@ -8,6 +8,7 @@ layout(binding = 0) uniform UniformBufferObject {
     mat4 geom_rot;
     mat4 view;
     mat4 proj;
+    bool[16] use_geom_shader;
 } ubo;
 
 layout(location = 0) in vec3 geoColor[];

shaders/shader.vert

@@ -5,6 +5,7 @@ layout(binding = 0) uniform UniformBufferObject {
     mat4 geom_rot;
     mat4 view;
     mat4 proj;
+    bool[16] use_geom_shader;
 } ubo;
 
 
@@ -16,7 +17,11 @@ layout(location = 0) out vec3 geoColor;
 layout(location = 1) out vec2 geoTexCoord;
 
 void main() {
-    gl_Position = ubo.proj * ubo.view * ubo.geom_rot * ubo.model *  vec4(inPosition, 1.0);
+    if (ubo.use_geom_shader[0]) {
+        gl_Position = ubo.geom_rot * ubo.model *  vec4(inPosition, 1.0);
+    } else {
+        gl_Position = ubo.proj * ubo.view * ubo.geom_rot * ubo.model *  vec4(inPosition, 1.0);
+    }
     geoColor = inColor;
     geoTexCoord = inTexCoord;
 }