Merge pull request #192 from JuliaPlots/sd/shader-fixes

fix missing outputs

assets/shader/heatmap.vert

@@ -11,11 +11,18 @@ uniform uint objectid;
 out vec2 o_uv;
 flat out uvec2 o_objectid;
 
+out vec4 o_view_pos;
+out vec3 o_normal;
+
 ivec2 ind2sub(ivec2 dim, int linearindex){
     return ivec2(linearindex % dim.x, linearindex / dim.x);
 }
 
 void main(){
+    //Outputs for ssao, which we don't use for 2d shaders like heatmap/image
+    o_view_pos = vec4(0);
+    o_normal = vec3(0);
+
     int index = gl_InstanceID;
     vec2 offset = vertices;
     ivec2 offseti = ivec2(offset);

assets/shader/image.vert

@@ -7,13 +7,19 @@ in vec2 texturecoordinates;
 uniform mat4 projection, view, model;
 uniform uint objectid;
 
-out vec2       o_uv;
+out vec2 o_uv;
 flat out uvec2 o_objectid;
 
+out vec4 o_view_pos;
+out vec3 o_normal;
+
 vec4 _position(vec3 p){return vec4(p,1);}
 vec4 _position(vec2 p){return vec4(p,0,1);}
 
 void main(){
+    //Outputs for ssao, which we don't use for 2d shaders like heatmap/image
+    o_view_pos = vec4(0);
+    o_normal = vec3(0);
     o_uv = texturecoordinates;
     o_objectid = uvec2(objectid, gl_VertexID+1);
     gl_Position = projection * view * model * _position(vertices);