307 lines
12 KiB
C++
307 lines
12 KiB
C++
/********************************************************************************
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* ReactPhysics3D physics library, http://www.reactphysics3d.com *
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* Copyright (c) 2010-2015 Daniel Chappuis *
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*********************************************************************************
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* *
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* This software is provided 'as-is', without any express or implied warranty. *
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* In no event will the authors be held liable for any damages arising from the *
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* use of this software. *
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* *
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* Permission is granted to anyone to use this software for any purpose, *
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* including commercial applications, and to alter it and redistribute it *
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* freely, subject to the following restrictions: *
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* *
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* 1. The origin of this software must not be misrepresented; you must not claim *
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* that you wrote the original software. If you use this software in a *
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* product, an acknowledgment in the product documentation would be *
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* appreciated but is not required. *
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* *
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* 2. Altered source versions must be plainly marked as such, and must not be *
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* misrepresented as being the original software. *
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* *
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* 3. This notice may not be removed or altered from any source distribution. *
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* *
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********************************************************************************/
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// Libraries
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#include "Cone.h"
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openglframework::VertexBufferObject Cone::mVBOVertices(GL_ARRAY_BUFFER);
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openglframework::VertexBufferObject Cone::mVBONormals(GL_ARRAY_BUFFER);
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openglframework::VertexBufferObject Cone::mVBOTextureCoords(GL_ARRAY_BUFFER);
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openglframework::VertexBufferObject Cone::mVBOIndices(GL_ELEMENT_ARRAY_BUFFER);
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openglframework::VertexArrayObject Cone::mVAO;
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int Cone::totalNbCones = 0;
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// Constructor
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Cone::Cone(float radius, float height, const openglframework::Vector3 &position,
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reactphysics3d::CollisionWorld* world,
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const std::string& meshFolderPath)
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: openglframework::Mesh(), mRadius(radius), mHeight(height),
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mColor(0.5f, 0.5f, 0.5f, 1.0f) {
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// Load the mesh from a file
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openglframework::MeshReaderWriter::loadMeshFromFile(meshFolderPath + "cone.obj", *this);
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// Calculate the normals of the mesh
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calculateNormals();
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// Compute the scaling matrix
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mScalingMatrix = openglframework::Matrix4(mRadius, 0, 0, 0,
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0, mHeight, 0, 0,
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0, 0, mRadius, 0,
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0, 0, 0, 1);
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// Initialize the position where the cone will be rendered
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translateWorld(position);
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// Create the collision shape for the rigid body (cone shape)
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// ReactPhysics3D will clone this object to create an internal one. Therefore,
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// it is OK if this object is destroyed right after calling RigidBody::addCollisionShape()
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const rp3d::ConeShape collisionShape(mRadius, mHeight);
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// Initial position and orientation of the rigid body
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rp3d::Vector3 initPosition(position.x, position.y, position.z);
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rp3d::Quaternion initOrientation = rp3d::Quaternion::identity();
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rp3d::Transform transform(initPosition, initOrientation);
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mPreviousTransform = transform;
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// Create a rigid body corresponding to the cone in the dynamics world
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mRigidBody = world->createCollisionBody(transform);
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// Add a collision shape to the body and specify the mass of the shape
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mRigidBody->addCollisionShape(collisionShape, rp3d::Transform::identity());
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mTransformMatrix = mTransformMatrix * mScalingMatrix;
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// Create the VBOs and VAO
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if (totalNbCones == 0) {
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createVBOAndVAO();
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}
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totalNbCones++;
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}
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// Constructor
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Cone::Cone(float radius, float height, const openglframework::Vector3 &position,
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float mass, reactphysics3d::DynamicsWorld* dynamicsWorld,
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const std::string& meshFolderPath)
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: openglframework::Mesh(), mRadius(radius), mHeight(height),
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mColor(0.5f, 0.5f, 0.5f, 1.0f) {
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// Load the mesh from a file
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openglframework::MeshReaderWriter::loadMeshFromFile(meshFolderPath + "cone.obj", *this);
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// Calculate the normals of the mesh
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calculateNormals();
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// Compute the scaling matrix
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mScalingMatrix = openglframework::Matrix4(mRadius, 0, 0, 0,
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0, mHeight, 0, 0,
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0, 0, mRadius, 0,
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0, 0, 0, 1);
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// Initialize the position where the cone will be rendered
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translateWorld(position);
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// Create the collision shape for the rigid body (cone shape)
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// ReactPhysics3D will clone this object to create an internal one. Therefore,
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// it is OK if this object is destroyed right after calling RigidBody::addCollisionShape()
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const rp3d::ConeShape collisionShape(mRadius, mHeight);
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// Initial position and orientation of the rigid body
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rp3d::Vector3 initPosition(position.x, position.y, position.z);
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rp3d::Quaternion initOrientation = rp3d::Quaternion::identity();
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rp3d::Transform transform(initPosition, initOrientation);
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// Create a rigid body corresponding to the cone in the dynamics world
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rp3d::RigidBody* body = dynamicsWorld->createRigidBody(transform);
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// Add a collision shape to the body and specify the mass of the shape
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body->addCollisionShape(collisionShape, rp3d::Transform::identity(), mass);
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mRigidBody = body;
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mTransformMatrix = mTransformMatrix * mScalingMatrix;
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// Create the VBOs and VAO
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if (totalNbCones == 0) {
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createVBOAndVAO();
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}
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totalNbCones++;
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}
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// Destructor
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Cone::~Cone() {
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if (totalNbCones == 1) {
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// Destroy the mesh
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destroy();
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// Destroy the VBOs and VAO
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mVBOIndices.destroy();
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mVBOVertices.destroy();
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mVBONormals.destroy();
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mVBOTextureCoords.destroy();
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mVAO.destroy();
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}
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totalNbCones--;
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}
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// Render the cone at the correct position and with the correct orientation
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void Cone::render(openglframework::Shader& shader,
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const openglframework::Matrix4& worldToCameraMatrix) {
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// Bind the shader
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shader.bind();
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// Set the model to camera matrix
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shader.setMatrix4x4Uniform("localToWorldMatrix", mTransformMatrix);
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shader.setMatrix4x4Uniform("worldToCameraMatrix", worldToCameraMatrix);
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// Set the normal matrix (inverse transpose of the 3x3 upper-left sub matrix of the
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// model-view matrix)
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const openglframework::Matrix4 localToCameraMatrix = worldToCameraMatrix * mTransformMatrix;
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const openglframework::Matrix3 normalMatrix =
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localToCameraMatrix.getUpperLeft3x3Matrix().getInverse().getTranspose();
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shader.setMatrix3x3Uniform("normalMatrix", normalMatrix, false);
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// Set the vertex color
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openglframework::Vector4 color(mColor.r, mColor.g, mColor.b, mColor.a);
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shader.setVector4Uniform("vertexColor", color, false);
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// Bind the VAO
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mVAO.bind();
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mVBOVertices.bind();
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// Get the location of shader attribute variables
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GLint vertexPositionLoc = shader.getAttribLocation("vertexPosition");
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GLint vertexNormalLoc = shader.getAttribLocation("vertexNormal", false);
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glEnableVertexAttribArray(vertexPositionLoc);
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if (vertexNormalLoc != -1) glEnableVertexAttribArray(vertexNormalLoc);
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glVertexAttribPointer(vertexPositionLoc, 3, GL_FLOAT, GL_FALSE, 0, (char*)NULL);
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if (vertexNormalLoc != -1) glVertexAttribPointer(vertexNormalLoc, 3, GL_FLOAT, GL_FALSE, 0, (char*)NULL);
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// For each part of the mesh
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for (unsigned int i=0; i<getNbParts(); i++) {
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glDrawElements(GL_TRIANGLES, getNbFaces(i) * 3, GL_UNSIGNED_INT, (char*)NULL);
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}
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glDisableVertexAttribArray(vertexPositionLoc);
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if (vertexNormalLoc != -1) glDisableVertexAttribArray(vertexNormalLoc);
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mVBOVertices.unbind();
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// Unbind the VAO
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mVAO.unbind();
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// Unbind the shader
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shader.unbind();
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}
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// Update the transform matrix of the cone
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void Cone::updateTransform(float interpolationFactor) {
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// Get the transform of the rigid body
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rp3d::Transform transform = mRigidBody->getTransform();
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// Interpolate the transform between the previous one and the new one
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rp3d::Transform interpolatedTransform = rp3d::Transform::interpolateTransforms(mPreviousTransform,
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transform,
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interpolationFactor);
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mPreviousTransform = transform;
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// Compute the transform used for rendering the cone
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rp3d::decimal matrix[16];
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interpolatedTransform.getOpenGLMatrix(matrix);
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openglframework::Matrix4 newMatrix(matrix[0], matrix[4], matrix[8], matrix[12],
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matrix[1], matrix[5], matrix[9], matrix[13],
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matrix[2], matrix[6], matrix[10], matrix[14],
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matrix[3], matrix[7], matrix[11], matrix[15]);
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// Apply the scaling matrix to have the correct cone dimensions
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mTransformMatrix = newMatrix * mScalingMatrix;
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}
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// Create the Vertex Buffer Objects used to render with OpenGL.
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/// We create two VBOs (one for vertices and one for indices)
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void Cone::createVBOAndVAO() {
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// Create the VBO for the vertices data
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mVBOVertices.create();
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mVBOVertices.bind();
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size_t sizeVertices = mVertices.size() * sizeof(openglframework::Vector3);
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mVBOVertices.copyDataIntoVBO(sizeVertices, getVerticesPointer(), GL_STATIC_DRAW);
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mVBOVertices.unbind();
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// Create the VBO for the normals data
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mVBONormals.create();
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mVBONormals.bind();
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size_t sizeNormals = mNormals.size() * sizeof(openglframework::Vector3);
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mVBONormals.copyDataIntoVBO(sizeNormals, getNormalsPointer(), GL_STATIC_DRAW);
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mVBONormals.unbind();
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if (hasTexture()) {
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// Create the VBO for the texture co data
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mVBOTextureCoords.create();
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mVBOTextureCoords.bind();
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size_t sizeTextureCoords = mUVs.size() * sizeof(openglframework::Vector2);
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mVBOTextureCoords.copyDataIntoVBO(sizeTextureCoords, getUVTextureCoordinatesPointer(), GL_STATIC_DRAW);
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mVBOTextureCoords.unbind();
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}
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// Create th VBO for the indices data
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mVBOIndices.create();
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mVBOIndices.bind();
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size_t sizeIndices = mIndices[0].size() * sizeof(uint);
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mVBOIndices.copyDataIntoVBO(sizeIndices, getIndicesPointer(), GL_STATIC_DRAW);
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mVBOIndices.unbind();
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// Create the VAO for both VBOs
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mVAO.create();
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mVAO.bind();
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// Bind the VBO of vertices
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mVBOVertices.bind();
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// Bind the VBO of normals
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mVBONormals.bind();
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if (hasTexture()) {
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// Bind the VBO of texture coords
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mVBOTextureCoords.bind();
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}
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// Bind the VBO of indices
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mVBOIndices.bind();
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// Unbind the VAO
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mVAO.unbind();
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}
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// Reset the transform
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void Cone::resetTransform(const rp3d::Transform& transform) {
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// Reset the transform
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mRigidBody->setTransform(transform);
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mRigidBody->setIsSleeping(false);
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// Reset the velocity of the rigid body
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rp3d::RigidBody* rigidBody = dynamic_cast<rp3d::RigidBody*>(mRigidBody);
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if (rigidBody != NULL) {
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rigidBody->setLinearVelocity(rp3d::Vector3(0, 0, 0));
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rigidBody->setAngularVelocity(rp3d::Vector3(0, 0, 0));
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}
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updateTransform(1.0f);
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}
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