implement entity model rendering

(cherry picked from commit a0e5d51290cf521d511f90e23445206a14c4a772)
2022-04-13 12:52:51 +02:00
parent fd071f296a
commit 4644b050c6
16 changed files with 454 additions and 5 deletions
@@ -0,0 +1,41 @@
+window.Polygon = class {
+
+    /**
+     * Bind UV mappings on the vertices
+     *
+     * @param vertices Vertex array
+     * @param minU     Minimum U coordinate
+     * @param minV     Minimum V coordinate
+     * @param maxU     Maximum U coordinate
+     * @param maxV     Maximum V coordinate
+     */
+    constructor(vertices, minU, minV, maxU, maxV) {
+        this.vertices = vertices;
+        this.vertexCount = vertices.length;
+
+        // Map UV on vertices
+        vertices[0] = vertices[0].remap(maxU, minV);
+        vertices[1] = vertices[1].remap(minU, minV);
+        vertices[2] = vertices[2].remap(minU, maxV);
+        vertices[3] = vertices[3].remap(maxU, maxV);
+    }
+
+    render(tessellator) {
+        // Set color of polygon
+        tessellator.setColor(1, 1, 1);
+
+        // Render all vertices
+        for (let i = 3; i >= 0; i--) {
+            let vertex = this.vertices[i];
+
+            // Bind UV mappings and render vertex
+            tessellator.addVertexWithUV(
+                vertex.position.x,
+                vertex.position.y,
+                vertex.position.z,
+                vertex.u / 64.0,
+                vertex.v / 32.0
+            );
+        }
+    }
+}