Add function to create circular points.

Author: bluekyu

render_pipeline/rpcore/util/primitives.hpp

@@ -7,6 +7,14 @@
 namespace rpcore {
 
 RENDER_PIPELINE_DECL NodePath create_points(const std::string& name, int count);
+
+/**
+ * Create circular points with radius.
+ *
+ * This creates circular points using 'effects/circular_point.yaml' effect.
+ */
+RENDER_PIPELINE_DECL NodePath create_circular_points(const std::string& name, int count, float radius);
+
 RENDER_PIPELINE_DECL NodePath create_cube(const std::string& name);
 RENDER_PIPELINE_DECL NodePath create_sphere(const std::string& name, unsigned int latitude, unsigned int longitude);
 

resources/effects/circular_points.yaml

@@ -3,10 +3,14 @@
 vertex:
     inout: |
         uniform mat4 p3d_ModelViewMatrix;
+        uniform mat4 p3d_ProjectionMatrix;
         uniform float point_radius;
 
     post_transform: |
-        gl_PointSize = point_radius / -(p3d_ModelViewMatrix * p3d_Vertex).z;
+        gl_PointSize = point_radius * WINDOW_WIDTH * p3d_ProjectionMatrix[0][0] / -(p3d_ModelViewMatrix * p3d_Vertex).z;
+
+        // override normal
+        vOutput.normal = normalize((p3d_ModelMatrix * vec4(0, -1, 0, 0)).xyz);
 
 
 fragment:

src/rpcore/util/primitives.cpp

@@ -5,7 +5,9 @@
 #include <geomPoints.h>
 #include <geomNode.h>
 #include <materialAttrib.h>
+#include <shaderAttrib.h>
 
+#include "render_pipeline/rpcore/render_pipeline.h"
 #include "render_pipeline/rpcore/util/rpmaterial.hpp"
 
 namespace rpcore {
@@ -24,7 +26,7 @@ static NodePath create_geom_node(const std::string& name, Geom* geom)
 
 NodePath create_points(const std::string& name, int count)
 {
-        // create vertices
+    // create vertices
     PT(GeomVertexData) vdata = new GeomVertexData(name, GeomVertexFormat::get_v3(), Geom::UsageHint::UH_static);
     vdata->unclean_set_num_rows(count);
 
@@ -46,6 +48,18 @@ NodePath create_points(const std::string& name, int count)
     return create_geom_node(name, geom);
 }
 
+NodePath create_circular_points(const std::string& name, int count, float radius)
+{
+    NodePath np = create_points(name, count);
+
+    np.set_shader_input("point_radius", radius);
+
+    rpcore::RenderPipeline::get_global_ptr()->set_effect(np, "effects/circular_points.yaml");
+    np.set_attrib(DCAST(ShaderAttrib, np.get_attrib(ShaderAttrib::get_class_type()))->set_flag(ShaderAttrib::F_shader_point_size, true));
+
+    return np;
+}
+
 NodePath create_cube(const std::string& name)
 {
     // create vertices