very basic chunk model

[blank.git] / src / model.cpp

diff --git a/src/model.cpp b/src/model.cpp
index bbfc97f4fcfb121f8646feec9d59680213958189..032fc150a9e449c12bc68d62c98609280fee09a8 100644 (file)
--- a/src/model.cpp
+++ b/src/model.cpp
@@ -3,17 +3,35 @@
 
 namespace blank {
 
-Model::Model(
-       std::vector<glm::vec3> &&vtx,
-       std::vector<glm::vec3> &&col,
-       std::vector<glm::vec3> &&norm
-)
-: vertices(vtx)
-, colors(col)
-, normals(norm)
-, handle{} {
+Model::Model()
+: vertices()
+, colors()
+, normals()
+, handle{}
+, dirty(false) {
        glGenBuffers(ATTRIB_COUNT, handle);
+}
+
+Model::~Model() {
+       glDeleteBuffers(ATTRIB_COUNT, handle);
+}
+
+
+void Model::Clear() {
+       vertices.clear();
+       colors.clear();
+       normals.clear();
+       Invalidate();
+}
 
+void Model::Reserve(int s) {
+       vertices.reserve(s);
+       colors.reserve(s);
+       normals.reserve(s);
+}
+
+
+void Model::Update() {
        glBindBuffer(GL_ARRAY_BUFFER, handle[ATTRIB_VERTEX]);
        glBufferData(GL_ARRAY_BUFFER, vertices.size() * sizeof(glm::vec3), vertices.data(), GL_STATIC_DRAW);
 
@@ -22,14 +40,16 @@ Model::Model(
 
        glBindBuffer(GL_ARRAY_BUFFER, handle[ATTRIB_NORMAL]);
        glBufferData(GL_ARRAY_BUFFER, normals.size() * sizeof(glm::vec3), normals.data(), GL_STATIC_DRAW);
-}
 
-Model::~Model() {
-       glDeleteBuffers(ATTRIB_COUNT, handle);
+       dirty = false;
 }
 
 
 void Model::Draw() {
+       if (dirty) {
+               Update();
+       }
+
        glEnableVertexAttribArray(ATTRIB_VERTEX);
        glBindBuffer(GL_ARRAY_BUFFER, handle[ATTRIB_VERTEX]);
        glVertexAttribPointer(