bloboland

annotate src/renderer.cc @ 3:a39c301cdcce

find changesets by author, revision, files, or words in the commit message
terrain raytracing pretty much done
author John Tsiombikas <nuclear@member.fsf.org>
date Sun, 16 Dec 2012 14:24:16 +0200
parents cfe68befb7cc
children 9021a906c5d3
rev   line source
nuclear@1 1 #include "opengl.h"
nuclear@1 2 #include "renderer.h"
nuclear@3 3 #include "sdr.h"
nuclear@1 4
nuclear@1 5 Renderer::Renderer()
nuclear@1 6 {
nuclear@1 7 leveltex = 0;
nuclear@1 8 sdrprog = 0;
nuclear@3 9
nuclear@3 10 level = 0;
nuclear@3 11
nuclear@3 12 fov = M_PI / 4.0;
nuclear@3 13 aspect = 1.0;
nuclear@1 14 }
nuclear@1 15
nuclear@1 16 Renderer::~Renderer()
nuclear@1 17 {
nuclear@1 18 shutdown();
nuclear@1 19 }
nuclear@1 20
nuclear@3 21 bool Renderer::init(Level *level)
nuclear@1 22 {
nuclear@3 23 if(!(sdrprog = create_program_load("sdr/bloboray.v.glsl", "sdr/bloboray.p.glsl"))) {
nuclear@1 24 return false;
nuclear@3 25 }
nuclear@3 26
nuclear@3 27 Volume *vol = level->terrain;
nuclear@1 28
nuclear@1 29 leveltex = new Texture3D;
nuclear@3 30 leveltex->create(vol->get_size(0), vol->get_size(1), vol->get_size(2));
nuclear@3 31
nuclear@3 32 this->level = level;
nuclear@1 33
nuclear@1 34 return true;
nuclear@1 35 }
nuclear@1 36
nuclear@1 37 void Renderer::shutdown()
nuclear@1 38 {
nuclear@1 39 delete leveltex;
nuclear@3 40 if(sdrprog) {
nuclear@3 41 free_program(sdrprog);
nuclear@3 42 }
nuclear@3 43 }
nuclear@3 44
nuclear@3 45 void Renderer::set_fov(float fov)
nuclear@3 46 {
nuclear@3 47 this->fov = fov;
nuclear@3 48 }
nuclear@3 49
nuclear@3 50 void Renderer::set_aspect(float aspect)
nuclear@3 51 {
nuclear@3 52 this->aspect = aspect;
nuclear@1 53 }
nuclear@1 54
nuclear@1 55 static void draw_cube(const Vector3 &pos, float sz);
nuclear@1 56
nuclear@3 57 void Renderer::render() const
nuclear@1 58 {
nuclear@3 59 leveltex->update((float*)level->terrain->get_data_ptr());
nuclear@3 60 bind_texture(leveltex);
nuclear@1 61
nuclear@3 62 set_uniform_float3(sdrprog, "volsize", level->terrain->get_size(0),
nuclear@3 63 level->terrain->get_size(1), level->terrain->get_size(2));
nuclear@3 64 set_uniform_float4(sdrprog, "camprop", fov, aspect, 0, 0);
nuclear@3 65 bind_program(sdrprog);
nuclear@3 66
nuclear@3 67 glBegin(GL_QUADS);
nuclear@3 68 glTexCoord2f(0, 0);
nuclear@3 69 glVertex2f(-1, -1);
nuclear@3 70 glTexCoord2f(1, 0);
nuclear@3 71 glVertex2f(1, -1);
nuclear@3 72 glTexCoord2f(1, 1);
nuclear@3 73 glVertex2f(1, 1);
nuclear@3 74 glTexCoord2f(0, 1);
nuclear@3 75 glVertex2f(-1, 1);
nuclear@3 76 glEnd();
nuclear@3 77
nuclear@3 78 bind_program(0);
nuclear@3 79 bind_texture(0);
nuclear@3 80
nuclear@3 81 /*glEnable(GL_COLOR_MATERIAL);
nuclear@1 82 glColorMaterial(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE);
nuclear@1 83
nuclear@1 84 glBegin(GL_QUADS);
nuclear@1 85 for(int i=0; i<vol->get_size(0); i++) {
nuclear@1 86 for(int j=0; j<vol->get_size(1); j++) {
nuclear@1 87 for(int k=0; k<vol->get_size(2) - 1; k++) {
nuclear@1 88 Vector4 vox = vol->get_voxel(i, j, k);
nuclear@1 89 Vector4 next = vol->get_voxel(i, j, k + 1);
nuclear@1 90
nuclear@1 91 if(vox.w > 0.1 && next.w < 0.1) {
nuclear@1 92 glColor3f(vox.x, vox.y, vox.z);
nuclear@1 93
nuclear@1 94 float x = ((float)i - vol->get_size(0) / 2) * 0.1;
nuclear@1 95 float z = ((float)j - vol->get_size(1) / 2) * 0.1;
nuclear@1 96 float y = ((float)k - vol->get_size(2) / 2) * 0.1;
nuclear@1 97 draw_cube(Vector3(x, y, z), 0.1);
nuclear@1 98 }
nuclear@1 99 }
nuclear@1 100 }
nuclear@1 101 }
nuclear@1 102 glEnd();
nuclear@1 103
nuclear@1 104 glDisable(GL_COLOR_MATERIAL);
nuclear@3 105 */
nuclear@1 106 }
nuclear@1 107
nuclear@1 108
nuclear@1 109 static void draw_cube(const Vector3 &pos, float sz)
nuclear@1 110 {
nuclear@1 111 sz /= 2.0;
nuclear@1 112
nuclear@1 113 glNormal3f(0, 0, 1);
nuclear@1 114 glVertex3f(pos.x - sz, pos.y - sz, pos.z + sz);
nuclear@1 115 glVertex3f(pos.x + sz, pos.y - sz, pos.z + sz);
nuclear@1 116 glVertex3f(pos.x + sz, pos.y + sz, pos.z + sz);
nuclear@1 117 glVertex3f(pos.x - sz, pos.y + sz, pos.z + sz);
nuclear@1 118
nuclear@1 119 glNormal3f(1, 0, 0);
nuclear@1 120 glVertex3f(pos.x + sz, pos.y - sz, pos.z + sz);
nuclear@1 121 glVertex3f(pos.x + sz, pos.y - sz, pos.z - sz);
nuclear@1 122 glVertex3f(pos.x + sz, pos.y + sz, pos.z - sz);
nuclear@1 123 glVertex3f(pos.x + sz, pos.y + sz, pos.z + sz);
nuclear@1 124
nuclear@1 125 glNormal3f(0, 0, -1);
nuclear@1 126 glVertex3f(pos.x + sz, pos.y - sz, pos.z - sz);
nuclear@1 127 glVertex3f(pos.x - sz, pos.y - sz, pos.z - sz);
nuclear@1 128 glVertex3f(pos.x - sz, pos.y + sz, pos.z - sz);
nuclear@1 129 glVertex3f(pos.x + sz, pos.y + sz, pos.z - sz);
nuclear@1 130
nuclear@1 131 glNormal3f(-1, 0, 0);
nuclear@1 132 glVertex3f(pos.x - sz, pos.y - sz, pos.z - sz);
nuclear@1 133 glVertex3f(pos.x - sz, pos.y - sz, pos.z + sz);
nuclear@1 134 glVertex3f(pos.x - sz, pos.y + sz, pos.z + sz);
nuclear@1 135 glVertex3f(pos.x - sz, pos.y + sz, pos.z - sz);
nuclear@1 136
nuclear@1 137 glNormal3f(0, 1, 0);
nuclear@1 138 glVertex3f(pos.x - sz, pos.y + sz, pos.z + sz);
nuclear@1 139 glVertex3f(pos.x + sz, pos.y + sz, pos.z + sz);
nuclear@1 140 glVertex3f(pos.x + sz, pos.y + sz, pos.z - sz);
nuclear@1 141 glVertex3f(pos.x - sz, pos.y + sz, pos.z - sz);
nuclear@1 142
nuclear@1 143 glNormal3f(0, -1, 0);
nuclear@1 144 glVertex3f(pos.x - sz, pos.y - sz, pos.z - sz);
nuclear@1 145 glVertex3f(pos.x + sz, pos.y - sz, pos.z - sz);
nuclear@1 146 glVertex3f(pos.x + sz, pos.y - sz, pos.z + sz);
nuclear@1 147 glVertex3f(pos.x - sz, pos.y - sz, pos.z + sz);
nuclear@1 148
nuclear@1 149 }