Improve mesh components

src/dawn/display/mesh/PlaneMesh.cpp

@@ -0,0 +1,59 @@
+// Copyright (c) 2024 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#include "PlaneMesh.hpp"
+
+using namespace Dawn;
+
+void PlaneMesh::buffer(
+  const std::shared_ptr<Mesh> mesh,
+  const glm::vec2 planeSize,
+  const int32_t columns,
+  const int32_t rows
+) {
+  const int32_t verticeCount = (columns + 1) * (rows + 1) * PLANE_VERTICE_PER_SEGMENT;
+  const int32_t indiceCount = columns * rows * PLANE_INDICE_PER_SEGMENT;
+  mesh->createBuffers(verticeCount, indiceCount);
+
+  const float columnWidth = planeSize.x / columns;
+  const float rowHeight = planeSize.y / rows;
+
+  glm::vec3 vertices[verticeCount];
+  glm::vec2 uvs[verticeCount];
+  int32_t indices[indiceCount];
+
+  int32_t verticeIndex = 0;
+  int32_t indiceIndex = 0;
+  for (int32_t row = 0; row <= rows; row++) {
+    for (int32_t column = 0; column <= columns; column++) {
+      const float x = column * columnWidth;
+      const float y = row * rowHeight;
+
+      vertices[verticeIndex] = glm::vec3(x, 0.0f, y);
+      uvs[verticeIndex] = glm::vec2((float)column / columns, (float)row / rows);
+      verticeIndex++;
+    }
+  }
+
+  for (int32_t row = 0; row < rows; row++) {
+    for (int32_t column = 0; column < columns; column++) {
+      const int32_t topLeft = (row * (columns + 1)) + column;
+      const int32_t topRight = topLeft + 1;
+      const int32_t bottomLeft = topLeft + (columns + 1);
+      const int32_t bottomRight = bottomLeft + 1;
+
+      indices[indiceIndex++] = topLeft;
+      indices[indiceIndex++] = bottomLeft;
+      indices[indiceIndex++] = topRight;
+      indices[indiceIndex++] = topRight;
+      indices[indiceIndex++] = bottomLeft;
+      indices[indiceIndex++] = bottomRight;
+    }
+  }
+
+  mesh->bufferPositions(0, vertices, verticeCount);
+  mesh->bufferCoordinates(0, uvs, verticeCount);
+  mesh->bufferIndices(0, indices, indiceCount);
+}