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#include <cstdlib> |
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#include <cstring> |
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|
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#include <algorithm> |
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|
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#include "opengl.h" |
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#include "material.h" |
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#include "view.h" |
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#include "util.h" |
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|
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material::~material () |
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{ |
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} |
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|
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void |
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simple_material::enable (view &ctx) |
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{ |
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glMaterialfv (GL_FRONT, GL_DIFFUSE, (GLfloat *) & diffuse); |
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glMaterialfv (GL_FRONT, GL_SPECULAR, (GLfloat *) & specular); |
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glMaterialfv (GL_FRONT, GL_EMISSION, (GLfloat *) & emission); |
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glMaterialf (GL_FRONT, GL_SHININESS, shininess); |
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} |
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|
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void |
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simple_material::disable (view &ctx) |
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{ |
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} |
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|
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GLuint |
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texture::load_texture (SDL_Surface * surface, GLfloat * tex2oord) |
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{ |
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GLuint name; |
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SDL_Surface *image; |
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SDL_Rect area; |
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Uint32 saved_flags; |
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Uint8 saved_alpha; |
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|
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/* Use the surface width and height expanded to powers of 2 */ |
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tex2oord[0] = 0.F; /* Min X */ |
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tex2oord[1] = 0.F; /* Min Y */ |
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tex2oord[2] = 1.F; /* Max X */ |
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tex2oord[3] = 1.F; /* Max Y */ |
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|
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image = SDL_CreateRGBSurface (SDL_SWSURFACE, surface->w, surface->h, 32, |
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#if SDL_BYTEORDER == SDL_LIL_ENDIAN /* OpenGL RGBA masks */ |
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0x000000FF, 0x0000FF00, 0x00FF0000, 0xFF000000 |
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#else |
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0xFF000000, 0x00FF0000, 0x0000FF00, 0x000000FF |
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#endif |
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); |
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|
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if (image == NULL) |
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return 0; |
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|
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/* Save the alpha blending attributes */ |
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saved_flags = surface->flags & (SDL_SRCALPHA | SDL_RLEACCELOK); |
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saved_alpha = surface->format->alpha; |
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if ((saved_flags & SDL_SRCALPHA) == SDL_SRCALPHA) |
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SDL_SetAlpha (surface, 0, 0); |
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|
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/* Copy the surface into the GL texture image */ |
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area.x = 0; |
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area.y = 0; |
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area.w = surface->w; |
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area.h = surface->h; |
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SDL_BlitSurface (surface, &area, image, &area); |
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|
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/* Restore the alpha blending attributes */ |
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if ((saved_flags & SDL_SRCALPHA) == SDL_SRCALPHA) |
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SDL_SetAlpha (surface, saved_flags, saved_alpha); |
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|
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/* Create an OpenGL texture for the image */ |
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glGenTextures (1, &name); |
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glBindTexture (GL_TEXTURE_2D, name); |
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glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); |
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glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR); |
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glTexParameteri (GL_TEXTURE_2D, GL_GENERATE_MIPMAP, GL_TRUE); |
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glTexImage2D (GL_TEXTURE_2D, |
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0, |
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GL_RGBA, surface->w, surface->h, 0, GL_RGBA, GL_UNSIGNED_BYTE, image->pixels); |
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SDL_FreeSurface (image); /* No longer needed */ |
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|
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return name; |
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} |
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|
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test_material::test_material () |
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//: tex ("textures/osama.jpg"), texvar (tex.name) |
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: tex ("textures/rockwall.jpg"), texvar (tex.name) |
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, norm ("textures/rockwall_height.jpg"), normvar (norm.name) |
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{ |
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using namespace shader::compile; |
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|
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p.vsh->start (); |
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|
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temp_4f wpos; |
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|
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wpos = model_view_projection_matrix * vin.vertex; |
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|
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//wpos = wpos / abs (w (wpos)); |
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|
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vout.position = wpos; |
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vout.tex_coord[0] = vin.tex_coord[0]; |
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vout.tex_coord[1] = model_view_matrix * shader::compile::vec4 (x(vin.normal), y(vin.normal), z(vin.normal), 0); |
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vout.tex_coord[2] = lightpos - model_view_matrix * vin.vertex; |
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|
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p.vsh->end (); |
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p.vsh->compile (); |
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|
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p.fsh->start (); |
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|
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temp_1f fac; |
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|
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temp_2f disp; |
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|
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temp_1f dx, dy; |
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|
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temp_1f bumpnormal; |
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dx = dFdx (texture_2d (normvar, fin.tex_coord[0])); |
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dy = dFdy (texture_2d (normvar, fin.tex_coord[0])); |
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|
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disp = shader::compile::vec2 (dx, dy) * 0.1; |
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|
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fac = dot (normalize (fin.tex_coord[1]), normalize (fin.tex_coord[2])); |
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//fac = dot (shader::compile::vec3 (normalize (fin.tex_coord[1]) + normalize (fin.tex_coord[2])) * 0.5, bumpnormal); |
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//fac = dot (bumpnormal, normalize (fin.tex_coord[2])); |
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//fac = pow (max (fac, 0.0), 8); |
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xyz (fout.frag_color) = (texture_2d (texvar, fin.tex_coord[0] - disp) + 0.1) * max (fac, 0.0); |
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|
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p.fsh->end (); |
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p.fsh->compile (); |
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p.link (); |
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} |
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|
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void test_material::enable (view &ctx) |
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{ |
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p.enable (); |
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lightpos->set (vec3 (0, 0, 0)); |
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texvar->enable (); |
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normvar->enable (); |
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} |
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|
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void test_material::disable (view &ctx) |
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{ |
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normvar->disable (); |
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texvar->disable (); |
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p.disable (); |
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} |
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