workable viewport structure

1 files changed, 94 insertions, 0 deletions

diff --git a/src/n1ck.rs b/src/n1ck.rs
new file mode 100644
index 0000000..db77278
--- /dev/null
+++ b/src/n1ck.rs
@@ -0,0 +1,94 @@
+use luminance::context::GraphicsContext;
+use luminance::framebuffer::Framebuffer;
+use luminance::pipeline::PipelineState;
+use luminance::render_state::RenderState;
+use luminance::shader::program::Program;
+use luminance::tess::{Mode, Tess, TessBuilder, TessSliceIndex};
+use luminance::texture::Dim2;
+
+use crate::vertex::{Vertex, VertexPosition, VertexRGB, VertexSemantics};
+
+fn gen_vertices() -> Vec<Vertex> {
+    let mut vertices: Vec<Vertex> = Vec::new();
+
+    vertices.push(Vertex {
+        position: VertexPosition::new([-0.5, -0.5]),
+        color: VertexRGB::new([255, 0, 0]),
+    });
+    vertices.push(Vertex {
+        position: VertexPosition::new([0.5, -0.5]),
+        color: VertexRGB::new([0, 255, 0]),
+    });
+    vertices.push(Vertex {
+        position: VertexPosition::new([0.0, 0.5]),
+        color: VertexRGB::new([0, 0, 255]),
+    });
+
+    vertices
+}
+
+fn alter_vertices(vertices: &mut Vec<Vertex>) {
+    for vertex in vertices {
+        if vertex.color[1] < 255 {
+            vertex.color[1] += 1;
+        }
+    }
+}
+
+pub struct N1ck {
+    vertices: Vec<Vertex>,
+    tessalation: Tess,
+}
+
+impl N1ck {
+    pub fn new<T: GraphicsContext>(mut surface: T) -> (N1ck, T) {
+        let vertices = gen_vertices();
+        let tessalation = TessBuilder::new(&mut surface)
+            .add_vertices(&vertices)
+            .set_mode(Mode::Triangle)
+            .build()
+            .unwrap();
+
+        (
+            N1ck {
+                vertices,
+                tessalation,
+            },
+            surface,
+        )
+    }
+
+    pub fn update<T: GraphicsContext>(&mut self, mut surface: T) -> T {
+        alter_vertices(&mut self.vertices);
+
+        self.tessalation = TessBuilder::new(&mut surface)
+            .add_vertices(&self.vertices)
+            .set_mode(Mode::Triangle)
+            .build()
+            .unwrap();
+
+        surface
+    }
+
+    pub fn draw<T: GraphicsContext>(
+        &self,
+        mut surface: T,
+        back_buffer: &Framebuffer<Dim2, (), ()>,
+        program: &Program<VertexSemantics, (), ()>,
+        pipeline_state: &PipelineState,
+    ) -> T {
+        surface.pipeline_builder().pipeline(
+            &back_buffer,
+            &pipeline_state,
+            |_pipeline, mut shd_gate| {
+                shd_gate.shade(&program, |_, mut rdr_gate| {
+                    rdr_gate.render(&RenderState::default(), |mut tess_gate| {
+                        tess_gate.render(self.tessalation.slice(..));
+                    });
+                });
+            },
+        );
+
+        surface
+    }
+}