1 files changed, 104 insertions, 0 deletions
diff --git a/model.cpp b/model.cpp
new file mode 100644
index 0000000..67e4561
--- /dev/null
+++ b/model.cpp
@@ -0,0 +1,104 @@
+#include "model.h"
+
+#include <iostream>
+#include <stdexcept>
+
+namespace models {
+
+Mesh::Mesh(const aiScene *scene, const aiMesh *mesh, std::map<std::string, GLuint>& scene_textures) {
+	aiMaterial *mat = scene->mMaterials[mesh->mMaterialIndex];
+	unsigned int texture_count = mat->GetTextureCount(aiTextureType_DIFFUSE);
+	for(unsigned int j = 0; j < texture_count; j++) {
+		aiString ai_path;
+		if(mat->GetTexture(aiTextureType_DIFFUSE, j, &ai_path) == AI_SUCCESS) {
+			std::string path(ai_path.data, ai_path.length);
+			GLuint tex = scene_textures[path];
+			textures.push_back(tex);
+		}
+	}
+
+	glGenBuffers(1, &vbo);
+	glBindBuffer(GL_ARRAY_BUFFER, vbo);
+
+	vertices = 0;
+
+	for(unsigned int i = 0; i < mesh->mNumFaces; i++)
+		vertices += mesh->mFaces[i].mNumIndices;
+
+	glBufferData(GL_ARRAY_BUFFER, vertices*3*2*3 * sizeof(float), NULL, GL_STATIC_DRAW);
+
+	float *buffer = (float*)glMapBuffer(GL_ARRAY_BUFFER, GL_WRITE_ONLY);
+
+	unsigned int index = 0;
+
+	for(unsigned int i = 0; i < mesh->mNumFaces; i++) {
+		aiFace *face = &mesh->mFaces[i];
+
+		for(unsigned int j = 0; j < face->mNumIndices; j++) {
+			aiVector3D *texcoord = &mesh->mTextureCoords[0][face->mIndices[j]];
+			aiVector3D *vertex = &mesh->mVertices[face->mIndices[j]];
+			aiVector3D *normal = &mesh->mNormals[face->mIndices[j]];
+
+			buffer[index++] = vertex->x;
+			buffer[index++] = vertex->y;
+			buffer[index++] = vertex->z;
+
+			buffer[index++] = texcoord->x;
+			buffer[index++] = 2 - texcoord->y;
+
+			buffer[index++] = normal->x;
+			buffer[index++] = normal->y;
+			buffer[index++] = normal->z;
+		}
+	}
+
+	glUnmapBuffer(GL_ARRAY_BUFFER);
+}
+
+Mesh::~Mesh() {
+	glDeleteBuffers(1, &vbo);
+}
+
+void Mesh::render() {
+	GLenum tex_i = GL_TEXTURE0;
+	for(std::vector<GLuint>::iterator it = textures.begin(); it != textures.end(); it++) {
+		glActiveTexture(tex_i++);
+		glBindTexture(GL_TEXTURE_2D, *it);
+	}
+	glActiveTexture(GL_TEXTURE0);
+
+	glBindBuffer(GL_ARRAY_BUFFER, vbo);
+
+	glPushClientAttrib(GL_CLIENT_ALL_ATTRIB_BITS);
+
+	glEnableClientState(GL_VERTEX_ARRAY);
+	glEnableClientState(GL_TEXTURE_COORD_ARRAY);
+	glEnableClientState(GL_NORMAL_ARRAY);
+
+	glVertexPointer(3, GL_FLOAT, 8*sizeof(float), NULL);
+	glTexCoordPointer(2, GL_FLOAT, 8*sizeof(float), (const GLvoid*)(sizeof(float)*3));
+	glNormalPointer(GL_FLOAT, 8*sizeof(float), (const GLvoid*)(sizeof(float)*5));
+	glDrawArrays(GL_TRIANGLES, 0, vertices);
+
+	glPopClientAttrib();
+
+	glBindBuffer(GL_ARRAY_BUFFER, 0);
+}
+
+Tree::Tree(const aiScene *scene, std::map<std::string, GLuint>& scene_textures) {
+	trunk = new Mesh(scene, scene->mMeshes[22], scene_textures);
+	leaves = new Mesh(scene, scene->mMeshes[3], scene_textures);
+}
+
+Tree::~Tree() {
+	delete trunk;
+	delete leaves;
+}
+
+void Tree::render() {
+	trunk->render();
+	glTranslatef(0.786, 2.845, 5.1);
+	leaves->render();
+}
+
+} // namespace models