advtrains.git - Advtrains mod for minetest.

	Commit message (Collapse)	Author	Age
*	Remove zip release files, move mod to root, exclude assets from Makefile (#92)	rubenwardy	2017-09-20
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*	Restructure mod directory	orwell96	2017-01-04
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*	Turning mod into a modpack and separating the trains from the core mod	orwell96	2016-12-20

/* Minetest Copyright (C) 2021 Liso <anlismon@gmail.com> This program is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ #include <cmath> #include "client/shadows/dynamicshadows.h" #include "client/client.h" #include "client/clientenvironment.h" #include "client/clientmap.h" #include "client/camera.h" using m4f = core::matrix4; static v3f quantizeDirection(v3f direction, float step) { float yaw = std::atan2(direction.Z, direction.X); float pitch = std::asin(direction.Y); // assume look is normalized yaw = std::floor(yaw / step) * step; pitch = std::floor(pitch / step) * step; return v3f(std::cos(yaw)*std::cos(pitch), std::sin(pitch), std::sin(yaw)*std::cos(pitch)); } void DirectionalLight::createSplitMatrices(const Camera *cam) { const float DISTANCE_STEP = BS * 2.0; // 2 meters v3f newCenter; v3f look = cam->getDirection(); look = quantizeDirection(look, M_PI / 12.0); // 15 degrees // camera view tangents float tanFovY = tanf(cam->getFovY() * 0.5f); float tanFovX = tanf(cam->getFovX() * 0.5f); // adjusted frustum boundaries float sfNear = future_frustum.zNear; float sfFar = adjustDist(future_frustum.zFar, cam->getFovY()); // adjusted camera positions v3f cam_pos_world = cam->getPosition(); cam_pos_world = v3f( floor(cam_pos_world.X / DISTANCE_STEP) * DISTANCE_STEP, floor(cam_pos_world.Y / DISTANCE_STEP) * DISTANCE_STEP, floor(cam_pos_world.Z / DISTANCE_STEP) * DISTANCE_STEP); v3f cam_pos_scene = v3f(cam_pos_world.X - cam->getOffset().X * BS, cam_pos_world.Y - cam->getOffset().Y * BS, cam_pos_world.Z - cam->getOffset().Z * BS); cam_pos_scene += look * sfNear; cam_pos_world += look * sfNear; // center point of light frustum v3f center_scene = cam_pos_scene + look * 0.35 * (sfFar - sfNear); v3f center_world = cam_pos_world + look * 0.35 * (sfFar - sfNear); // Create a vector to the frustum far corner const v3f &viewUp = cam->getCameraNode()->getUpVector(); v3f viewRight = look.crossProduct(viewUp); v3f farCorner = (look + viewRight * tanFovX + viewUp * tanFovY).normalize(); // Compute the frustumBoundingSphere radius v3f boundVec = (cam_pos_scene + farCorner * sfFar) - center_scene; float radius = boundVec.getLength(); float length = radius * 3.0f; v3f eye_displacement = quantizeDirection(direction, M_PI / 2880 /*15 seconds*/) * length; // we must compute the viewmat with the position - the camera offset // but the future_frustum position must be the actual world position v3f eye = center_scene - eye_displacement; future_frustum.player = cam_pos_scene; future_frustum.position = center_world - eye_displacement; future_frustum.length = length; future_frustum.radius = radius; future_frustum.ViewMat.buildCameraLookAtMatrixLH(eye, center_scene, v3f(0.0f, 1.0f, 0.0f)); future_frustum.ProjOrthMat.buildProjectionMatrixOrthoLH(radius, radius, 0.0f, length, false); future_frustum.camera_offset = cam->getOffset(); } DirectionalLight::DirectionalLight(const u32 shadowMapResolution, const v3f &position, video::SColorf lightColor, f32 farValue) : diffuseColor(lightColor), farPlane(farValue), mapRes(shadowMapResolution), pos(position) {} void DirectionalLight::update_frustum(const Camera *cam, Client *client, bool force) { if (dirty && !force) return; float zNear = cam->getCameraNode()->getNearValue(); float zFar = getMaxFarValue(); if (!client->getEnv().getClientMap().getControl().range_all) zFar = MYMIN(zFar, client->getEnv().getClientMap().getControl().wanted_range * BS); /////////////////////////////////// // update splits near and fars future_frustum.zNear = zNear; future_frustum.zFar = zFar; // update shadow frustum createSplitMatrices(cam); // get the draw list for shadows client->getEnv().getClientMap().updateDrawListShadow( getPosition(), getDirection(), future_frustum.radius, future_frustum.length); should_update_map_shadow = true; dirty = true; // when camera offset changes, adjust the current frustum view matrix to avoid flicker v3s16 cam_offset = cam->getOffset(); if (cam_offset != shadow_frustum.camera_offset) { v3f rotated_offset; shadow_frustum.ViewMat.rotateVect(rotated_offset, intToFloat(cam_offset - shadow_frustum.camera_offset, BS)); shadow_frustum.ViewMat.setTranslation(shadow_frustum.ViewMat.getTranslation() + rotated_offset); shadow_frustum.player += intToFloat(shadow_frustum.camera_offset - cam->getOffset(), BS); shadow_frustum.camera_offset = cam_offset; } } void DirectionalLight::commitFrustum() { if (!dirty) return; shadow_frustum = future_frustum; dirty = false; } void DirectionalLight::setDirection(v3f dir) { direction = -dir; direction.normalize(); } v3f DirectionalLight::getPosition() const { return shadow_frustum.position; } v3f DirectionalLight::getPlayerPos() const { return shadow_frustum.player; } v3f DirectionalLight::getFuturePlayerPos() const { return future_frustum.player; } const m4f &DirectionalLight::getViewMatrix() const { return shadow_frustum.ViewMat; } const m4f &DirectionalLight::getProjectionMatrix() const { return shadow_frustum.ProjOrthMat; } const m4f &DirectionalLight::getFutureViewMatrix() const { return future_frustum.ViewMat; } const m4f &DirectionalLight::getFutureProjectionMatrix() const { return future_frustum.ProjOrthMat; } m4f DirectionalLight::getViewProjMatrix() { return shadow_frustum.ProjOrthMat * shadow_frustum.ViewMat; }