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Diffstat (limited to 'src/farmesh.cpp')
| -rw-r--r-- | src/farmesh.cpp | 253 |
1 files changed, 253 insertions, 0 deletions
diff --git a/src/farmesh.cpp b/src/farmesh.cpp new file mode 100644 index 000000000..e4847966f --- /dev/null +++ b/src/farmesh.cpp @@ -0,0 +1,253 @@ +/* +Part of Minetest-c55 +Copyright (C) 2011 celeron55, Perttu Ahola <celeron55@gmail.com> + +This program is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2 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 General Public License for more details. + +You should have received a copy of the GNU 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. +*/ + +/* + A quick messy implementation of terrain rendering for a long + distance according to map seed +*/ + +#include "farmesh.h" +#include "constants.h" +#include "debug.h" +#include "noise.h" +#include "map.h" + +FarMesh::FarMesh( + scene::ISceneNode* parent, + scene::ISceneManager* mgr, + s32 id, + u64 seed +): + scene::ISceneNode(parent, mgr, id), + m_seed(seed), + m_camera_pos(0,0), + m_time(0) +{ + dstream<<__FUNCTION_NAME<<std::endl; + + m_material.setFlag(video::EMF_LIGHTING, false); + m_material.setFlag(video::EMF_BACK_FACE_CULLING, true); + m_material.setFlag(video::EMF_BILINEAR_FILTER, false); + m_material.setFlag(video::EMF_FOG_ENABLE, false); + //m_material.setFlag(video::EMF_ANTI_ALIASING, true); + //m_material.MaterialType = video::EMT_TRANSPARENT_VERTEX_ALPHA; + + m_box = core::aabbox3d<f32>(-BS*1000000,-BS*31000,-BS*1000000, + BS*1000000,BS*31000,BS*1000000); + +} + +FarMesh::~FarMesh() +{ + dstream<<__FUNCTION_NAME<<std::endl; +} + +void FarMesh::OnRegisterSceneNode() +{ + if(IsVisible) + { + //SceneManager->registerNodeForRendering(this, scene::ESNRP_TRANSPARENT); + //SceneManager->registerNodeForRendering(this, scene::ESNRP_SOLID); + SceneManager->registerNodeForRendering(this, scene::ESNRP_SKY_BOX); + } + + ISceneNode::OnRegisterSceneNode(); +} + +#define MYROUND(x) (x > 0.0 ? (int)x : (int)x - 1) + +// Temporary hack +core::map<v2s16, float> g_heights; + +float ground_height(u64 seed, v2s16 p2d) +{ + core::map<v2s16, float>::Node *n = g_heights.find(p2d); + if(n) + return n->getValue(); + float avg_mud_amount = 4; + float gh = BS*base_rock_level_2d(seed, p2d) + avg_mud_amount*BS; + //gh *= 10; + g_heights[p2d] = gh; + return gh; +} + +void FarMesh::render() +{ + video::IVideoDriver* driver = SceneManager->getVideoDriver(); + + /*if(SceneManager->getSceneNodeRenderPass() != scene::ESNRP_TRANSPARENT) + return;*/ + /*if(SceneManager->getSceneNodeRenderPass() != scene::ESNRP_SOLID) + return;*/ + if(SceneManager->getSceneNodeRenderPass() != scene::ESNRP_SKY_BOX) + return; + + driver->setTransform(video::ETS_WORLD, AbsoluteTransformation); + driver->setMaterial(m_material); + + const s16 grid_radius_i = 12; + const float grid_size = BS*50; + const v2f grid_speed(-BS*0, 0); + + // Position of grid noise origin in world coordinates + v2f world_grid_origin_pos_f(0,0); + // Position of grid noise origin from the camera + v2f grid_origin_from_camera_f = world_grid_origin_pos_f - m_camera_pos; + // The center point of drawing in the noise + v2f center_of_drawing_in_noise_f = -grid_origin_from_camera_f; + // The integer center point of drawing in the noise + v2s16 center_of_drawing_in_noise_i( + MYROUND(center_of_drawing_in_noise_f.X / grid_size), + MYROUND(center_of_drawing_in_noise_f.Y / grid_size) + ); + // The world position of the integer center point of drawing in the noise + v2f world_center_of_drawing_in_noise_f = v2f( + center_of_drawing_in_noise_i.X * grid_size, + center_of_drawing_in_noise_i.Y * grid_size + ) + world_grid_origin_pos_f; + + for(s16 zi=-grid_radius_i; zi<grid_radius_i; zi++) + for(s16 xi=-grid_radius_i; xi<grid_radius_i; xi++) + { + v2s16 p_in_noise_i( + xi+center_of_drawing_in_noise_i.X, + zi+center_of_drawing_in_noise_i.Y + ); + + /*if((p_in_noise_i.X + p_in_noise_i.Y)%2==0) + continue;*/ + /*if((p_in_noise_i.X/2 + p_in_noise_i.Y/2)%2==0) + continue;*/ + + v2f p0 = v2f(xi,zi)*grid_size + world_center_of_drawing_in_noise_f; + + /*double noise[4]; + double d = 100*BS; + noise[0] = d*noise2d_perlin( + (float)(p_in_noise_i.X+0)*grid_size/BS/100, + (float)(p_in_noise_i.Y+0)*grid_size/BS/100, + m_seed, 3, 0.5); + + noise[1] = d*noise2d_perlin( + (float)(p_in_noise_i.X+0)*grid_size/BS/100, + (float)(p_in_noise_i.Y+1)*grid_size/BS/100, + m_seed, 3, 0.5); + + noise[2] = d*noise2d_perlin( + (float)(p_in_noise_i.X+1)*grid_size/BS/100, + (float)(p_in_noise_i.Y+1)*grid_size/BS/100, + m_seed, 3, 0.5); + + noise[3] = d*noise2d_perlin( + (float)(p_in_noise_i.X+1)*grid_size/BS/100, + (float)(p_in_noise_i.Y+0)*grid_size/BS/100, + m_seed, 3, 0.5);*/ + + float noise[4]; + noise[0] = ground_height(m_seed, v2s16( + (p_in_noise_i.X+0)*grid_size/BS, + (p_in_noise_i.Y+0)*grid_size/BS)); + noise[1] = ground_height(m_seed, v2s16( + (p_in_noise_i.X+0)*grid_size/BS, + (p_in_noise_i.Y+1)*grid_size/BS)); + noise[2] = ground_height(m_seed, v2s16( + (p_in_noise_i.X+1)*grid_size/BS, + (p_in_noise_i.Y+1)*grid_size/BS)); + noise[3] = ground_height(m_seed, v2s16( + (p_in_noise_i.X+1)*grid_size/BS, + (p_in_noise_i.Y+0)*grid_size/BS)); + + float h_min = BS*65535; + float h_max = -BS*65536; + for(u32 i=0; i<4; i++) + { + if(noise[i] < h_min) + h_min = noise[i]; + if(noise[i] > h_max) + h_max = noise[i]; + } + float steepness = (h_max - h_min)/grid_size; + + float h_avg = (noise[0]+noise[1]+noise[2]+noise[3])/4.0; + float light_f = noise[0]+noise[1]-noise[2]-noise[3]; + light_f /= 100; + if(light_f < -1.0) light_f = -1.0; + if(light_f > 1.0) light_f = 1.0; + //light_f += 1.0; + //light_f /= 2.0; + + v2f p1 = p0 + v2f(1,1)*grid_size; + + video::SColor c; + // Detect water + if(h_avg < WATER_LEVEL*BS && h_max < (WATER_LEVEL+5)*BS) + { + c = video::SColor(128,59,86,146); + /*// Set to water level + for(u32 i=0; i<4; i++) + { + if(noise[i] < BS*WATER_LEVEL) + noise[i] = BS*WATER_LEVEL; + }*/ + light_f = 0; + } + else if(steepness > 2.0) + c = video::SColor(128,128,128,128); + else + c = video::SColor(128,107,134,51); + + // Set to water level + for(u32 i=0; i<4; i++) + { + if(noise[i] < BS*WATER_LEVEL) + noise[i] = BS*WATER_LEVEL; + } + + float b = m_brightness + light_f*0.1*m_brightness; + if(b < 0) b = 0; + if(b > 2) b = 2; + + c = video::SColor(128, b*c.getRed(), b*c.getGreen(), b*c.getBlue()); + + video::S3DVertex vertices[4] = + { + video::S3DVertex(p0.X,noise[0],p0.Y, 0,0,0, c, 0,1), + video::S3DVertex(p0.X,noise[1],p1.Y, 0,0,0, c, 1,1), + video::S3DVertex(p1.X,noise[2],p1.Y, 0,0,0, c, 1,0), + video::S3DVertex(p1.X,noise[3],p0.Y, 0,0,0, c, 0,0), + }; + u16 indices[] = {0,1,2,2,3,0}; + driver->drawVertexPrimitiveList(vertices, 4, indices, 2, + video::EVT_STANDARD, scene::EPT_TRIANGLES, video::EIT_16BIT); + } + + driver->clearZBuffer(); +} + +void FarMesh::step(float dtime) +{ + m_time += dtime; +} + +void FarMesh::update(v2f camera_p, float brightness) +{ + m_camera_pos = camera_p; + m_brightness = brightness; +} + |