void GLFWOSPRayWindow::motion(const ospcommon::vec2f &position)
{
static ospcommon::vec2f previousMouse(-1);
const ospcommon::vec2f mouse(position.x, position.y);
if (previousMouse != ospcommon::vec2f(-1)) {
const bool leftDown =
glfwGetMouseButton(glfwWindow, GLFW_MOUSE_BUTTON_LEFT) == GLFW_PRESS;
const bool rightDown =
glfwGetMouseButton(glfwWindow, GLFW_MOUSE_BUTTON_RIGHT) == GLFW_PRESS;
const bool middleDown =
glfwGetMouseButton(glfwWindow, GLFW_MOUSE_BUTTON_MIDDLE) == GLFW_PRESS;
const ospcommon::vec2f prev = previousMouse;
bool cameraChanged = leftDown || rightDown || middleDown;
if (leftDown) {
const ospcommon::vec2f mouseFrom(
ospcommon::clamp(prev.x * 2.f / windowSize.x - 1.f, -1.f, 1.f),
ospcommon::clamp(prev.y * 2.f / windowSize.y - 1.f, -1.f, 1.f));
const ospcommon::vec2f mouseTo(
ospcommon::clamp(mouse.x * 2.f / windowSize.x - 1.f, -1.f, 1.f),
ospcommon::clamp(mouse.y * 2.f / windowSize.y - 1.f, -1.f, 1.f));
arcballCamera->rotate(mouseFrom, mouseTo);
} else if (rightDown) {
arcballCamera->zoom(mouse.y - prev.y);
} else if (middleDown) {
arcballCamera->pan(ospcommon::vec2f(mouse.x - prev.x, prev.y - mouse.y));
}
if (cameraChanged) {
ospFrameBufferClear(framebuffer, OSP_FB_COLOR | OSP_FB_ACCUM);
ospSetf(camera, "aspect", windowSize.x / float(windowSize.y));
ospSetVec3f(camera,
"pos",
osp::vec3f{arcballCamera->eyePos().x,
arcballCamera->eyePos().y,
arcballCamera->eyePos().z});
ospSetVec3f(camera,
"dir",
osp::vec3f{arcballCamera->lookDir().x,
arcballCamera->lookDir().y,
arcballCamera->lookDir().z});
ospSetVec3f(camera,
"up",
osp::vec3f{arcballCamera->upDir().x,
arcballCamera->upDir().y,
arcballCamera->upDir().z});
ospCommit(camera);
}
}
previousMouse = mouse;
}
void PerspectiveCamera::commit()
{
if (!ospCamera) create();
ospSetVec3f(ospCamera,"pos",from);
ospSetVec3f(ospCamera,"dir",at - from);
ospSetVec3f(ospCamera,"up",up);
ospSetf(ospCamera,"aspect",aspect);
ospSetf(ospCamera,"fovy",fovy);
ospCommit(ospCamera);
}
void OSPObjectFile::importAttributeFloat3(const tinyxml2::XMLNode *node, OSPObject parent) {
//! The attribute value is encoded in a string.
const char *text = node->ToElement()->GetText(); vec3f value = vec3f(0.0f); char guard[8];
//! Get the attribute value.
exitOnCondition(sscanf(text, "%f %f %f %7s", &value.x, &value.y, &value.z, guard) != 3, "malformed XML element '" + std::string(node->ToElement()->Name()) + "'");
//! Set the attribute on the parent object.
ospSetVec3f(parent, node->ToElement()->Name(), value);
}
GLFWOSPRayWindow::GLFWOSPRayWindow(const ospcommon::vec2i &windowSize,
const ospcommon::box3f &worldBounds,
OSPModel model,
OSPRenderer renderer)
: windowSize(windowSize),
worldBounds(worldBounds),
model(model),
renderer(renderer)
{
if (activeWindow != nullptr)
throw std::runtime_error("Cannot create more than one GLFWOSPRayWindow!");
activeWindow = this;
// initialize GLFW
if (!glfwInit())
throw std::runtime_error("Failed to initialize GLFW!");
// create GLFW window
glfwWindow = glfwCreateWindow(
windowSize.x, windowSize.y, "OSPRay Tutorial", NULL, NULL);
if (!glfwWindow) {
glfwTerminate();
throw std::runtime_error("Failed to create GLFW window!");
}
// make the window's context current
glfwMakeContextCurrent(glfwWindow);
ImGui_ImplGlfwGL3_Init(glfwWindow, true);
// set initial OpenGL state
glEnable(GL_TEXTURE_2D);
glDisable(GL_LIGHTING);
// create OpenGL frame buffer texture
glGenTextures(1, &framebufferTexture);
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, framebufferTexture);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
// set GLFW callbacks
glfwSetFramebufferSizeCallback(
glfwWindow, [](GLFWwindow *, int newWidth, int newHeight) {
activeWindow->reshape(ospcommon::vec2i{newWidth, newHeight});
});
glfwSetCursorPosCallback(glfwWindow, [](GLFWwindow *, double x, double y) {
ImGuiIO &io = ImGui::GetIO();
if (!io.WantCaptureMouse)
activeWindow->motion(ospcommon::vec2f{float(x), float(y)});
});
glfwSetKeyCallback(glfwWindow,
[](GLFWwindow *, int key, int, int action, int) {
if (action == GLFW_PRESS) {
switch (key) {
case GLFW_KEY_G:
activeWindow->showUi = !(activeWindow->showUi);
break;
}
}
});
// OSPRay setup
// set the model on the renderer
ospSetObject(renderer, "model", model);
// create the arcball camera model
arcballCamera = std::unique_ptr<ArcballCamera>(
new ArcballCamera(worldBounds, windowSize));
// create camera
camera = ospNewCamera("perspective");
ospSetf(camera, "aspect", windowSize.x / float(windowSize.y));
ospSetVec3f(camera,
"pos",
osp::vec3f{arcballCamera->eyePos().x,
arcballCamera->eyePos().y,
arcballCamera->eyePos().z});
ospSetVec3f(camera,
"dir",
osp::vec3f{arcballCamera->lookDir().x,
arcballCamera->lookDir().y,
arcballCamera->lookDir().z});
ospSetVec3f(camera,
"up",
osp::vec3f{arcballCamera->upDir().x,
arcballCamera->upDir().y,
arcballCamera->upDir().z});
ospCommit(camera);
// set camera on the renderer
ospSetObject(renderer, "camera", camera);
// finally, commit the renderer
ospCommit(renderer);
// trigger window reshape events with current window size
glfwGetFramebufferSize(glfwWindow, &this->windowSize.x, &this->windowSize.y);
reshape(this->windowSize);
}
