添加批量drawcall

Sandbox/assets/shaders/FlatColor.glsl

@@ -0,0 +1,26 @@
+// Flat Color Shader
+
+#type vertex
+#version 460 core
+
+layout(location = 0) in vec3 a_Position;
+layout(location = 1) in vec2 a_TexCoord;
+
+uniform mat4 u_ViewProjection;
+uniform mat4 u_Transform;
+
+
+void main() {
+    gl_Position = u_ViewProjection * u_Transform * vec4(a_Position, 1.0f);
+}
+
+#type fragment
+#version 460 core
+
+layout(location = 0) out vec4 color;
+
+uniform vec4 u_Color;
+
+void main() {
+        color = u_Color;
+}