Point4 Matrix4x4::operator*(const Point4& p) const
{
Point4 result;
glusMatrix4x4MultiplyPoint4f(result.p, m, p.p);
return result;
}
GLUSboolean init(GLUSvoid)
{
GLfloat lightDirection[3] = { 1.0f, 1.0f, 1.0f };
GLfloat color[4] = { 0.0f, 1.0f, 1.0f, 1.0f };
GLUStextfile computeSource;
GLUStextfile vertexSource;
GLUStextfile fragmentSource;
GLint i;
GLfloat matrix[16];
GLfloat* normals;
GLfloat distanceRest;
GLfloat distanceDiagonalRest;
GLfloat sphereCenter[4] = {0.0f, 0.0f, -0.01f, 1.0f};
GLfloat sphereRadius = 1.0f;
glusFileLoadText("../Example40/shader/cloth.comp.glsl", &computeSource);
glusProgramBuildComputeFromSource(&g_computeProgram, (const GLchar**) &computeSource.text);
glusFileDestroyText(&computeSource);
glusFileLoadText("../Example40/shader/cloth.vert.glsl", &vertexSource);
glusFileLoadText("../Example40/shader/cloth.frag.glsl", &fragmentSource);
glusProgramBuildFromSource(&g_program, (const GLUSchar**) &vertexSource.text, 0, 0, 0, (const GLUSchar**) &fragmentSource.text);
glusFileDestroyText(&vertexSource);
glusFileDestroyText(&fragmentSource);
//
g_verticesPerRowLocation = glGetUniformLocation(g_computeProgram.program, "u_verticesPerRow");
g_deltaTimeLocation = glGetUniformLocation(g_computeProgram.program, "u_deltaTime");
g_distanceRestLocation = glGetUniformLocation(g_computeProgram.program, "u_distanceRest");
g_distanceDiagonalRestLocation = glGetUniformLocation(g_computeProgram.program, "u_distanceDiagonalRest");
g_sphereCenterLocation = glGetUniformLocation(g_computeProgram.program, "u_sphereCenter");
g_sphereRadiusLocation = glGetUniformLocation(g_computeProgram.program, "u_sphereRadius");
g_modelViewProjectionMatrixLocation = glGetUniformLocation(g_program.program, "u_modelViewProjectionMatrix");
g_normalMatrixLocation = glGetUniformLocation(g_program.program, "u_normalMatrix");
g_lightDirectionLocation = glGetUniformLocation(g_program.program, "u_lightDirection");
g_colorLocation = glGetUniformLocation(g_program.program, "u_color");
g_vertexLocation = glGetAttribLocation(g_program.program, "a_vertex");
g_normalLocation = glGetAttribLocation(g_program.program, "a_normal");
//
// Use a helper function to create a grid plane.
glusShapeCreateRectangularGridPlanef(&g_gridPlane, 2.0f, 2.0f, ROWS, ROWS, GLUS_FALSE);
// Use x, as only horizontal and vertical springs are used. Adapt this, if diagonal or a non square grid is used.
distanceRest = g_gridPlane.vertices[4] - g_gridPlane.vertices[0];
distanceDiagonalRest = sqrtf(2.0f * distanceRest * distanceRest);
// Rotate by 90 degrees, that the grid is in the x-z-plane.
glusMatrix4x4Identityf(matrix);
glusMatrix4x4Translatef(matrix, 0.0f, 1.1f, 0.0f);
glusMatrix4x4RotateRxf(matrix, -90.0f);
for (i = 0; i < g_gridPlane.numberVertices; i++)
{
glusMatrix4x4MultiplyPoint4f(&g_gridPlane.vertices[4 * i], matrix, &g_gridPlane.vertices[4 * i]);
}
g_numberIndicesPlane = g_gridPlane.numberIndices;
glGenBuffers(1, &g_indicesVBO);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesVBO);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, g_gridPlane.numberIndices * sizeof(GLuint), (GLuint*) g_gridPlane.indices, GL_STATIC_DRAW);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
//
normals = (GLfloat*)malloc(g_gridPlane.numberVertices * 4 * sizeof(GLfloat));
// Add one more GLfloat channel as padding for std430 layout.
glusPaddingConvertf(normals, g_gridPlane.normals, 3, 1, g_gridPlane.numberVertices);
free(g_gridPlane.normals);
g_gridPlane.normals = normals;
//
glGenBuffers(3, g_verticesBuffer);
glBindBuffer(GL_SHADER_STORAGE_BUFFER, g_verticesBuffer[0]);
glBufferData(GL_SHADER_STORAGE_BUFFER, g_gridPlane.numberVertices * 4 * sizeof(GLfloat), g_gridPlane.vertices, GL_DYNAMIC_DRAW);
glBindBuffer(GL_SHADER_STORAGE_BUFFER, g_verticesBuffer[1]);
glBufferData(GL_SHADER_STORAGE_BUFFER, g_gridPlane.numberVertices * 4 * sizeof(GLfloat), g_gridPlane.vertices, GL_DYNAMIC_DRAW);
glBindBuffer(GL_SHADER_STORAGE_BUFFER, g_verticesBuffer[2]);
glBufferData(GL_SHADER_STORAGE_BUFFER, g_gridPlane.numberVertices * 4 * sizeof(GLfloat), 0, GL_DYNAMIC_DRAW);
glGenBuffers(1, &g_normalsBuffer);
glBindBuffer(GL_SHADER_STORAGE_BUFFER, g_normalsBuffer);
glBufferData(GL_SHADER_STORAGE_BUFFER, g_gridPlane.numberVertices * 4 * sizeof(GLfloat), g_gridPlane.normals, GL_DYNAMIC_DRAW);
//
glUseProgram(g_program.program);
glGenVertexArrays(1, &g_vao);
glBindVertexArray(g_vao);
glBindBuffer(GL_ARRAY_BUFFER, g_normalsBuffer);
glVertexAttribPointer(g_normalLocation, 4, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_normalLocation);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesBuffer[2]);
glVertexAttribPointer(g_vertexLocation, 4, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_vertexLocation);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesVBO);
glBindVertexArray(0);
//
glusVector3Normalizef(lightDirection);
glUniform3fv(g_lightDirectionLocation, 1, lightDirection);
glUniform4fv(g_colorLocation, 1, color);
glUseProgram(0);
//
glUseProgram(g_computeProgram.program);
glUniform1i(g_verticesPerRowLocation, ROWS + 1);
glUniform1f(g_distanceRestLocation, distanceRest);
glUniform1f(g_distanceDiagonalRestLocation, distanceDiagonalRest);
glUniform4fv(g_sphereCenterLocation, 1, sphereCenter);
glUniform1f(g_sphereRadiusLocation, sphereRadius);
glUseProgram(0);
//
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
glClearDepth(1.0f);
glEnable(GL_DEPTH_TEST);
//
if (!initSphere(sphereCenter, sphereRadius, lightDirection))
{
return GLUS_FALSE;
}
return GLUS_TRUE;
}
GLUSboolean update(GLUSfloat time)
{
static GLfloat angle = 0.0f;
GLuint primitivesWritten;
// Field of view
GLfloat rotationMatrix[16];
GLfloat positionTextureSpace[4];
GLfloat directionTextureSpace[3];
GLfloat leftNormalTextureSpace[3];
GLfloat rightNormalTextureSpace[3];
GLfloat backNormalTextureSpace[3];
GLfloat xzPosition2D[4];
//
GLfloat tmvpMatrix[16];
// Animation update
g_personView.cameraPosition[0] = -cosf(2.0f * GLUS_PI * angle / TURN_DURATION) * TURN_RADIUS * METERS_TO_VIRTUAL_WORLD_SCALE;
g_personView.cameraPosition[2] = -sinf(2.0f * GLUS_PI * angle / TURN_DURATION) * TURN_RADIUS * METERS_TO_VIRTUAL_WORLD_SCALE;
g_personView.cameraDirection[0] = sinf(2.0f * GLUS_PI * angle / TURN_DURATION);
g_personView.cameraDirection[2] = -cosf(2.0f * GLUS_PI * angle / TURN_DURATION);
if (g_animationOn)
{
angle += time;
}
glusMatrix4x4LookAtf(g_viewMatrix, g_activeView->cameraPosition[0], g_activeView->cameraPosition[1], g_activeView->cameraPosition[2], g_activeView->cameraPosition[0] + g_activeView->cameraDirection[0], g_activeView->cameraPosition[1] + g_activeView->cameraDirection[1],
g_activeView->cameraPosition[2] + g_activeView->cameraDirection[2], g_activeView->cameraUp[0], g_activeView->cameraUp[1], g_activeView->cameraUp[2]);
glusMatrix4x4Identityf(tmvpMatrix);
glusMatrix4x4Multiplyf(tmvpMatrix, tmvpMatrix, g_projectionMatrix);
glusMatrix4x4Multiplyf(tmvpMatrix, tmvpMatrix, g_viewMatrix);
glusMatrix4x4Multiplyf(tmvpMatrix, tmvpMatrix, g_textureToWorldMatrix);
// Position
xzPosition2D[0] = g_personView.cameraPosition[0];
xzPosition2D[1] = 0.0f;
xzPosition2D[2] = g_personView.cameraPosition[2];
xzPosition2D[3] = g_personView.cameraPosition[3];
glusMatrix4x4MultiplyPoint4f(positionTextureSpace, g_worldToTextureMatrix, xzPosition2D);
// Direction
glusMatrix4x4MultiplyVector3f(directionTextureSpace, g_worldToTextureMatrix, g_personView.cameraDirection);
// Left normal of field of view
glusMatrix4x4Identityf(rotationMatrix);
glusMatrix4x4RotateRyf(rotationMatrix, g_personView.fov * (g_width / g_height) / 2.0f + 90.0f);
glusMatrix4x4MultiplyVector3f(leftNormalTextureSpace, rotationMatrix, g_personView.cameraDirection);
glusMatrix4x4MultiplyVector3f(leftNormalTextureSpace, g_worldToTextureNormalMatrix, leftNormalTextureSpace);
// Right normal of field of view
glusMatrix4x4Identityf(rotationMatrix);
glusMatrix4x4RotateRyf(rotationMatrix, -g_personView.fov * (g_width / g_height) / 2.0f - 90.0f);
glusMatrix4x4MultiplyVector3f(rightNormalTextureSpace, rotationMatrix, g_personView.cameraDirection);
glusMatrix4x4MultiplyVector3f(rightNormalTextureSpace, g_worldToTextureNormalMatrix, rightNormalTextureSpace);
// Back normal of field of view
glusMatrix4x4Identityf(rotationMatrix);
glusMatrix4x4RotateRyf(rotationMatrix, 180.0f);
glusMatrix4x4MultiplyVector3f(backNormalTextureSpace, rotationMatrix, g_personView.cameraDirection);
glusMatrix4x4MultiplyVector3f(backNormalTextureSpace, g_worldToTextureNormalMatrix, backNormalTextureSpace);
// OpenGL stuff
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// Pass one.
// Disable any rasterization
glEnable(GL_RASTERIZER_DISCARD);
glUseProgram(g_programPassOne.program);
glUniform4fv(g_positionTextureSpacePassOneLocation, 1, positionTextureSpace);
glUniform3fv(g_leftNormalTextureSpacePassOneLocation, 1, leftNormalTextureSpace);
glUniform3fv(g_rightNormalTextureSpacePassOneLocation, 1, rightNormalTextureSpace);
glUniform3fv(g_backNormalTextureSpacePassOneLocation, 1, backNormalTextureSpace);
glBindVertexArray(g_vaoPassOne);
// Bind to vertices used in render pass two. To this buffer is written.
glBindBufferBase(GL_TRANSFORM_FEEDBACK_BUFFER, 0, g_verticesPassTwoVBO);
// We need to know, how many primitives are written. So start the query.
glBeginQuery(GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN, g_transformFeedbackQuery);
// Start the operation ...
glBeginTransformFeedback(GL_POINTS);
// ... render the elements ...
glDrawElements(GL_POINTS, g_sNumPoints * g_tNumPoints, GL_UNSIGNED_INT, 0);
// ... and stop the operation.
glEndTransformFeedback();
// Now, we can also stop the query.
glEndQuery(GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN);
glDisable(GL_RASTERIZER_DISCARD);
glBindBufferBase(GL_TRANSFORM_FEEDBACK_BUFFER, 0, 0);
glBindVertexArray(0);
// Pass two
glUseProgram(g_shaderProgramPassTwo.program);
glUniformMatrix4fv(g_tmvpPassTwoLocation, 1, GL_FALSE, tmvpMatrix);
glUniform4fv(g_positionTextureSpacePassTwoLocation, 1, positionTextureSpace);
glBindVertexArray(g_vaoPassTwo);
// Now get the number of primitives written in the first render pass.
glGetQueryObjectuiv(g_transformFeedbackQuery, GL_QUERY_RESULT, &primitivesWritten);
// No draw the final terrain.
glDrawArrays(GL_PATCHES, 0, primitivesWritten);
return GLUS_TRUE;
}
void DebugDrawFactory::createDefaultDebugGeometry() const
{
LineGeometrySP lineGeometry;
GLUSline gridPlane;
glusLineCreateRectangularGridf(&gridPlane, 50.0f, 50.0f, 50, 50);
lineGeometry = LineGeometrySP(new LineGeometry(gridPlane));
glusLineDestroyf(&gridPlane);
LineGeometryManager::getInstance()->setLineGeometry("GridPlane", lineGeometry);
GLUSshape sphere;
glusShapeCreateSpheref(&sphere, 1.0f, 16);
lineGeometry = LineGeometrySP(new LineGeometry(sphere));
glusShapeDestroyf(&sphere);
LineGeometryManager::getInstance()->setLineGeometry("Sphere", lineGeometry);
GLUSshape cone;
glusShapeCreateConef(&cone, 0.5f, 0.5f, 16, 16);
lineGeometry = LineGeometrySP(new LineGeometry(cone));
glusShapeDestroyf(&cone);
LineGeometryManager::getInstance()->setLineGeometry("Cone", lineGeometry);
GLUSshape pyramid;
glusShapeCreateConef(&pyramid, 0.5f, 0.5f, 4, 1);
// The pyramid gets rotated. So adjust the height to the edge and not the vertex.
float height = sqrtf(0.125f);
Matrix4x4 modelMatrix;
modelMatrix.scale(0.5f / height, 1.0f, 0.5f / height);
modelMatrix.rotateRzRyRx(0.0f, 45.0f, 0.0f);
for (uint32_t i = 0; i < pyramid.numberVertices; i++)
{
glusMatrix4x4MultiplyPoint4f(&pyramid.vertices[i*4], modelMatrix.getM(), &pyramid.vertices[i*4]);
}
lineGeometry = LineGeometrySP(new LineGeometry(pyramid));
glusShapeDestroyf(&pyramid);
LineGeometryManager::getInstance()->setLineGeometry("Pyramid", lineGeometry);
GLUSshape cylinder;
glusShapeCreateCylinderf(&cylinder, 0.5f, 0.5f, 16);
lineGeometry = LineGeometrySP(new LineGeometry(cylinder));
glusShapeDestroyf(&cone);
LineGeometryManager::getInstance()->setLineGeometry("Cylinder", lineGeometry);
GLUSline square;
glusLineCreateSquaref(&square, 1.0f);
lineGeometry = LineGeometrySP(new LineGeometry(square));
glusLineDestroyf(&square);
LineGeometryManager::getInstance()->setLineGeometry("Square", lineGeometry);
GLUSline circle;
glusLineCreateCirclef(&circle, 1.0f, 32);
lineGeometry = LineGeometrySP(new LineGeometry(circle));
glusLineDestroyf(&circle);
LineGeometryManager::getInstance()->setLineGeometry("Circle", lineGeometry);
GLUSline singleLine;
GLUSfloat origin0[4] = {0.0f, 0.0f, 0.0f, 1.0f};
GLUSfloat origin1[4] = {0.0f, 0.0f, 0.0f, 1.0f};
glusLineCreateLinef(&singleLine, origin0, origin1);
lineGeometry = LineGeometrySP(new LineGeometry(singleLine));
glusLineDestroyf(&singleLine);
LineGeometryManager::getInstance()->setLineGeometry("SingleLine", lineGeometry);
}
GLUSboolean init(GLUSvoid)
{
GLUSshape sphere;
GLUStextfile vertexSource;
GLUStextfile geometrySource;
GLUStextfile fragmentSource;
glusFileLoadText("../Example10/shader/dublicate.vert.glsl", &vertexSource);
glusFileLoadText("../Example10/shader/dublicate.geom.glsl", &geometrySource);
glusFileLoadText("../Example10/shader/dublicate.frag.glsl", &fragmentSource);
glusProgramBuildFromSource(&g_program, (const GLUSchar**) &vertexSource.text, 0, 0, (const GLUSchar**) &geometrySource.text, (const GLUSchar**) &fragmentSource.text);
glusFileDestroyText(&vertexSource);
glusFileDestroyText(&geometrySource);
glusFileDestroyText(&fragmentSource);
//
g_projectionMatrixLocation = glGetUniformLocation(g_program.program, "u_projectionMatrix");
g_viewMatrixLocation = glGetUniformLocation(g_program.program, "u_viewMatrix");
g_normalMatrixLocation = glGetUniformLocation(g_program.program, "u_normalMatrix");
g_lightPositionLocation = glGetUniformLocation(g_program.program, "u_lightPosition");
g_vertexLocation = glGetAttribLocation(g_program.program, "a_vertex");
g_normalLocation = glGetAttribLocation(g_program.program, "a_normal");
//
glusShapeCreateSpheref(&sphere, 1.0f, 32);
g_numberIndicesSphere = sphere.numberIndices;
glGenBuffers(1, &g_verticesVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesVBO);
glBufferData(GL_ARRAY_BUFFER, sphere.numberVertices * 4 * sizeof(GLfloat), (GLfloat*) sphere.vertices, GL_STATIC_DRAW);
glGenBuffers(1, &g_normalsVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_normalsVBO);
glBufferData(GL_ARRAY_BUFFER, sphere.numberVertices * 3 * sizeof(GLfloat), (GLfloat*) sphere.normals, GL_STATIC_DRAW);
glGenBuffers(1, &g_indicesVBO);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesVBO);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, sphere.numberIndices * sizeof(GLuint), (GLuint*) sphere.indices, GL_STATIC_DRAW);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
glusShapeDestroyf(&sphere);
//
glUseProgram(g_program.program);
glusMatrix4x4LookAtf(g_viewMatrix, 0.0f, 0.0f, 6.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f);
glUniformMatrix4fv(g_viewMatrixLocation, 1, GL_FALSE, g_viewMatrix);
glusMatrix4x4ExtractMatrix3x3f(g_normalMatrix, g_viewMatrix);
glUniformMatrix3fv(g_normalMatrixLocation, 1, GL_FALSE, g_normalMatrix);
glusMatrix4x4MultiplyPoint4f(g_lightPosition, g_viewMatrix, g_lightPosition);
glUniform4fv(g_lightPositionLocation, 1, g_lightPosition);
//
glGenVertexArrays(1, &g_vao);
glBindVertexArray(g_vao);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesVBO);
glVertexAttribPointer(g_vertexLocation, 4, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_vertexLocation);
glBindBuffer(GL_ARRAY_BUFFER, g_normalsVBO);
glVertexAttribPointer(g_normalLocation, 3, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_normalLocation);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesVBO);
//
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
glClearDepth(1.0f);
glEnable(GL_DEPTH_TEST);
glEnable(GL_CULL_FACE);
return GLUS_TRUE;
}