outline pointed-at block

[blank.git] / src / model.cpp

diff --git a/src/model.cpp b/src/model.cpp
index 4ee621afbb614605acd7dd3a02674721e6d3bc3c..b50ccf0b168888ce0dff21e7d7423cc643c4cc01 100644 (file)
--- a/src/model.cpp
+++ b/src/model.cpp
@@ -1,26 +1,193 @@
 #include "model.hpp"
 
-#include <glm/gtc/matrix_transform.hpp>
-#include <glm/gtx/euler_angles.hpp>
-#include <glm/gtx/transform.hpp>
+#include <iostream>
 
 
 namespace blank {
 
 Model::Model()
-: position(0, 0, 0)
-, pitch(0)
-, yaw(0) {
-
+: 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);
+
+#ifndef NDEBUG
+       if (colors.size() < vertices.size()) {
+               std::cerr << "Model: not enough colors!" << std::endl;
+               colors.resize(vertices.size(), { 1, 0, 1 });
+       }
+#endif
+       glBindBuffer(GL_ARRAY_BUFFER, handle[ATTRIB_COLOR]);
+       glBufferData(GL_ARRAY_BUFFER, colors.size() * sizeof(glm::vec3), colors.data(), GL_STATIC_DRAW);
 
+#ifndef NDEBUG
+       if (normals.size() < vertices.size()) {
+               std::cerr << "Model: not enough normals!" << std::endl;
+               normals.resize(vertices.size(), { 0, 1, 0 });
+       }
+#endif
+       glBindBuffer(GL_ARRAY_BUFFER, handle[ATTRIB_NORMAL]);
+       glBufferData(GL_ARRAY_BUFFER, normals.size() * sizeof(glm::vec3), normals.data(), GL_STATIC_DRAW);
+
+       dirty = false;
+}
+
+
+void Model::Draw() {
+       if (dirty) {
+               Update();
+       }
+
+       glEnableVertexAttribArray(ATTRIB_VERTEX);
+       glBindBuffer(GL_ARRAY_BUFFER, handle[ATTRIB_VERTEX]);
+       glVertexAttribPointer(
+               ATTRIB_VERTEX, // location (for shader)
+               3,             // size
+               GL_FLOAT,      // type
+               GL_FALSE,      // normalized
+               0,             // stride
+               nullptr        // offset
+       );
+
+       glEnableVertexAttribArray(ATTRIB_COLOR);
+       glBindBuffer(GL_ARRAY_BUFFER, handle[ATTRIB_COLOR]);
+       glVertexAttribPointer(
+               ATTRIB_COLOR,  // location (for shader)
+               3,             // size
+               GL_FLOAT,      // type
+               GL_FALSE,      // normalized
+               0,             // stride
+               nullptr        // offset
+       );
+
+       glEnableVertexAttribArray(ATTRIB_NORMAL);
+       glBindBuffer(GL_ARRAY_BUFFER, handle[ATTRIB_NORMAL]);
+       glVertexAttribPointer(
+               ATTRIB_NORMAL, // location (for shader)
+               3,             // size
+               GL_FLOAT,      // type
+               GL_FALSE,      // normalized
+               0,             // stride
+               nullptr        // offset
+       );
+
+       glDrawArrays(
+               GL_TRIANGLES,   // how
+               0,              // start
+               vertices.size() // len
+       );
+
+       glDisableVertexAttribArray(ATTRIB_NORMAL);
+       glDisableVertexAttribArray(ATTRIB_COLOR);
+       glDisableVertexAttribArray(ATTRIB_VERTEX);
 }
 
 
-glm::mat4 Model::Transform() const {
-       return glm::translate(position) * glm::eulerAngleYX(yaw, pitch);
+OutlineModel::OutlineModel()
+: vertices()
+, colors()
+, handle{}
+, dirty(false) {
+       glGenBuffers(ATTRIB_COUNT, handle);
+}
+
+OutlineModel::~OutlineModel() {
+       glDeleteBuffers(ATTRIB_COUNT, handle);
+}
+
+
+void OutlineModel::Clear() {
+       vertices.clear();
+       colors.clear();
+       Invalidate();
+}
+
+void OutlineModel::Reserve(int s) {
+       vertices.reserve(s);
+       colors.reserve(s);
+}
+
+
+void OutlineModel::Update() {
+       glBindBuffer(GL_ARRAY_BUFFER, handle[ATTRIB_VERTEX]);
+       glBufferData(GL_ARRAY_BUFFER, vertices.size() * sizeof(glm::vec3), vertices.data(), GL_STATIC_DRAW);
+
+#ifndef NDEBUG
+       if (colors.size() < vertices.size()) {
+               std::cerr << "OutlineModel: not enough colors!" << std::endl;
+               colors.resize(vertices.size(), { 1, 0, 1 });
+       }
+#endif
+       glBindBuffer(GL_ARRAY_BUFFER, handle[ATTRIB_COLOR]);
+       glBufferData(GL_ARRAY_BUFFER, colors.size() * sizeof(glm::vec3), colors.data(), GL_STATIC_DRAW);
+
+       dirty = false;
+}
+
+
+void OutlineModel::Draw() {
+       if (dirty) {
+               Update();
+       }
+
+       glEnableVertexAttribArray(ATTRIB_VERTEX);
+       glBindBuffer(GL_ARRAY_BUFFER, handle[ATTRIB_VERTEX]);
+       glVertexAttribPointer(
+               ATTRIB_VERTEX, // location (for shader)
+               3,             // size
+               GL_FLOAT,      // type
+               GL_FALSE,      // normalized
+               0,             // stride
+               nullptr        // offset
+       );
+
+       glEnableVertexAttribArray(ATTRIB_COLOR);
+       glBindBuffer(GL_ARRAY_BUFFER, handle[ATTRIB_COLOR]);
+       glVertexAttribPointer(
+               ATTRIB_COLOR,  // location (for shader)
+               3,             // size
+               GL_FLOAT,      // type
+               GL_FALSE,      // normalized
+               0,             // stride
+               nullptr        // offset
+       );
+
+       glLineWidth(2.0f);
+
+       glDrawArrays(
+               GL_LINES,       // how
+               0,              // start
+               vertices.size() // len
+       );
+
+       glDisableVertexAttribArray(ATTRIB_COLOR);
+       glDisableVertexAttribArray(ATTRIB_VERTEX);
 }
 
 }