Improve appearance of the 3D View in the Map Editor

The object indicators are now drawn in wireframe - just a temporary
thing until I figure out how I want to style them. The ambient factor is
also increased so not everything is so dark.

apps/mapeditor/src/objectpass.cpp

@@ -105,7 +105,7 @@ void ObjectPass::createPipeline()
 
     VkPipelineRasterizationStateCreateInfo rasterizer = {};
     rasterizer.sType = VK_STRUCTURE_TYPE_PIPELINE_RASTERIZATION_STATE_CREATE_INFO;
-    rasterizer.polygonMode = VK_POLYGON_MODE_FILL;
+    rasterizer.polygonMode = VK_POLYGON_MODE_LINE;
     rasterizer.cullMode = VK_CULL_MODE_NONE;
     rasterizer.frontFace = VK_FRONT_FACE_COUNTER_CLOCKWISE;
     rasterizer.lineWidth = 1.0f;

renderer/shaders/mesh.frag

@@ -21,7 +21,7 @@ layout(std430, push_constant) uniform PushConstant {
 };
 
 void main() {
-    const vec3 lightPos = vec3(3);
+    const vec3 lightPos = vec3(5);
 
     vec3 diffuse;
     if (textureSize(diffuseTexture, 0).x == 1) {
@@ -41,5 +41,5 @@ void main() {
 
     float diff = max(dot(norm, lightDir), 0.0);
 
-    outColor = vec4(diffuse * (diff + 0.1), 1.0);
+    outColor = vec4(diffuse * (diff + 0.5), 1.0);
 }