Add points frag and vertex shaders

Author: chutsu

src/shaders/points.frag

@@ -0,0 +1,7 @@
+#version 150 core
+in vec3 color;
+out vec4 frag_color;
+
+void main() {
+  frag_color = vec4(color, 1.0f);
+}

src/shaders/points.vert

@@ -0,0 +1,14 @@
+#version 330 core
+layout (location = 0) in vec3 in_pos;
+layout (location = 1) in vec3 in_color;
+out vec3 color;
+
+uniform mat4 model;
+uniform mat4 view;
+uniform mat4 projection;
+
+void main() {
+  gl_Position = projection * view * model * vec4(in_pos, 1.0);
+  gl_PointSize = 1.0;
+  color = in_color;
+}