Gabriele Cosmo
260 lines
6.2 KiB
Plaintext
260 lines
6.2 KiB
Plaintext
// Copyright (C) 2010, Guy Barrand. All rights reserved.
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// See the file tools.license for terms.
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#ifndef tools_sg_state
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#define tools_sg_state
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#include <string>
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#include "../lina/rotf" //m_camera_orientation
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#include "../lina/mat4f"
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#include "../lina/vec3f"
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#include "../lina/vec4f"
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#include "../colorf"
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#include "enums"
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namespace tools {
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namespace sg {
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class state {
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public:
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state()
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//must be consistent with tools::sg::viewer::render.
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:m_ww(0)
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,m_wh(0)
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,m_GL_DEPTH_TEST(true)
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,m_GL_LIGHTING(false)
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,m_GL_CULL_FACE(true)
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,m_GL_POLYGON_OFFSET_FILL(false)
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,m_GL_TEXTURE_2D(false)
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,m_GL_POINT_SMOOTH(false)
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,m_GL_LINE_SMOOTH(false)
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,m_GL_BLEND(false)
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,m_use_gsto(false)
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,m_winding(winding_ccw)
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,m_color(1,1,1,1)
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,m_normal(0,0,1)
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,m_light(0)
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,m_draw_type(sg::draw_filled)
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,m_shade_model(sg::shade_flat)
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,m_line_width(1)
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,m_line_pattern(sg::line_solid)
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,m_point_size(1)
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,m_camera_ortho(true)
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,m_camera_znear(1)
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,m_camera_zfar(10)
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,m_camera_position(vec3f(0,0,1))
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,m_camera_orientation(rotf(vec3f(0,0,1),0))
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,m_camera_lrbt(0,0,0,0)
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{
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}
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virtual ~state(){
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}
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public:
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state(const state& a_from)
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:m_ww(a_from.m_ww)
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,m_wh(a_from.m_wh)
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,m_proj(a_from.m_proj)
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,m_model(a_from.m_model)
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,m_GL_DEPTH_TEST(a_from.m_GL_DEPTH_TEST)
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,m_GL_LIGHTING(a_from.m_GL_LIGHTING)
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,m_GL_CULL_FACE(a_from.m_GL_CULL_FACE)
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,m_GL_POLYGON_OFFSET_FILL(a_from.m_GL_POLYGON_OFFSET_FILL)
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,m_GL_TEXTURE_2D(a_from.m_GL_TEXTURE_2D)
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,m_GL_POINT_SMOOTH(a_from.m_GL_POINT_SMOOTH)
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,m_GL_LINE_SMOOTH(a_from.m_GL_LINE_SMOOTH)
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,m_GL_BLEND(a_from.m_GL_BLEND)
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,m_use_gsto(a_from.m_use_gsto)
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,m_winding(a_from.m_winding)
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,m_color(a_from.m_color)
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,m_normal(a_from.m_normal)
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,m_light(a_from.m_light)
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,m_draw_type(a_from.m_draw_type)
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,m_shade_model(a_from.m_shade_model)
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,m_line_width(a_from.m_line_width)
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,m_line_pattern(a_from.m_line_pattern)
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,m_point_size(a_from.m_point_size)
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,m_camera_ortho(a_from.m_camera_ortho)
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,m_camera_znear(a_from.m_camera_znear)
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,m_camera_zfar(a_from.m_camera_zfar)
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,m_camera_position(a_from.m_camera_position)
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,m_camera_orientation(a_from.m_camera_orientation)
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,m_camera_lrbt(a_from.m_camera_lrbt)
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{
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}
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state& operator=(const state& a_from){
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m_ww = a_from.m_ww;
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m_wh = a_from.m_wh;
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m_proj = a_from.m_proj;
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m_model = a_from.m_model;
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m_GL_DEPTH_TEST = a_from.m_GL_DEPTH_TEST;
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m_GL_LIGHTING = a_from.m_GL_LIGHTING;
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m_GL_CULL_FACE = a_from.m_GL_CULL_FACE;
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m_GL_POLYGON_OFFSET_FILL = a_from.m_GL_POLYGON_OFFSET_FILL;
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m_GL_TEXTURE_2D = a_from.m_GL_TEXTURE_2D;
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m_GL_POINT_SMOOTH = a_from.m_GL_POINT_SMOOTH;
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m_GL_LINE_SMOOTH = a_from.m_GL_LINE_SMOOTH;
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m_GL_BLEND = a_from.m_GL_BLEND;
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m_use_gsto = a_from.m_use_gsto;
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m_winding = a_from.m_winding;
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m_color = a_from.m_color;
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m_normal = a_from.m_normal;
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m_light = a_from.m_light;
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m_draw_type = a_from.m_draw_type;
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m_shade_model = a_from.m_shade_model;
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m_line_width = a_from.m_line_width;
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m_line_pattern = a_from.m_line_pattern;
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m_point_size = a_from.m_point_size;
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m_camera_ortho = a_from.m_camera_ortho;
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m_camera_znear = a_from.m_camera_znear;
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m_camera_zfar = a_from.m_camera_zfar;
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m_camera_position = a_from.m_camera_position;
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m_camera_orientation = a_from.m_camera_orientation;
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m_camera_lrbt = a_from.m_camera_lrbt;
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return *this;
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}
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public:
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bool project_point(float& a_x,float& a_y,float& a_z,float& a_w) const {
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a_w = 1;
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m_model.mul_4f(a_x,a_y,a_z,a_w);
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m_proj.mul_4f(a_x,a_y,a_z,a_w);
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if(a_w==0.0F) return false;
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a_x /= a_w;
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a_y /= a_w;
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a_z /= a_w;
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return true;
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}
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void screen2ndc(int a_x,int a_y, //signed because of wall.
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float& a_wcx,float& a_wcy,float& a_wcz,float& a_wcw) const {
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// a proj point in near plane has (z,w) :
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// ortho -1,1 -> z/w = -1 and xy in [-1,1][-1,1]
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// persp -n,n -> z/w = -1 and xy in [-n,n][-n,n]
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a_wcx = 2*(float(a_x)/float(m_ww)-0.5f); //in [-1,1]
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a_wcy = 2*(float(a_y)/float(m_wh)-0.5f);
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a_wcz = -1;
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if(m_camera_ortho) {
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a_wcw = 1;
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} else {
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float t = m_camera_znear;
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a_wcx *= t;
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a_wcy *= t;
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a_wcz *= t;
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a_wcw = t;
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}
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}
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bool screen2wc(int a_x,int a_y, //signed because of wall.
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float& a_wcx,float& a_wcy,float& a_wcz) const {
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mat4f mtx = m_proj;
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mtx.mul_mtx(m_model);
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mat4f inv;
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if(!mtx.invert(inv)) {a_wcx = 0;a_wcy = 0;a_wcz = 0;return false;}
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float w;
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screen2ndc(a_x,a_y,a_wcx,a_wcy,a_wcz,w);
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inv.mul_4f(a_wcx,a_wcy,a_wcz,w);
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if(w==0.0F) return false;
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a_wcx /= w;
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a_wcy /= w;
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a_wcz /= w;
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return true;
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}
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bool screen2pwc(int a_x,int a_y, //signed because of wall.
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float& a_wcx,float& a_wcy,float& a_wcz) const {
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mat4f mtx = m_proj;
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mat4f inv;
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if(!mtx.invert(inv)) {a_wcx = 0;a_wcy = 0;a_wcz = 0;return false;}
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float w;
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screen2ndc(a_x,a_y,a_wcx,a_wcy,a_wcz,w);
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inv.mul_4f(a_wcx,a_wcy,a_wcz,w);
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if(w==0.0F) return false;
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a_wcx /= w;
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a_wcy /= w;
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a_wcz /= w;
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return true;
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}
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void camera_proj_only(mat4f& a_mtx) const {
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float l = m_camera_lrbt[0];
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float r = m_camera_lrbt[1];
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float b = m_camera_lrbt[2];
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float t = m_camera_lrbt[3];
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float n = m_camera_znear;
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float f = m_camera_zfar;
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if(m_camera_ortho) {
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a_mtx.set_ortho(l,r,b,t,n,f);
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} else {
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a_mtx.set_frustum(l,r,b,t,n,f);
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}
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}
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public:
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unsigned int m_ww; //window width
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unsigned int m_wh; //window height
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mat4f m_proj;
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mat4f m_model;
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bool m_GL_DEPTH_TEST;
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bool m_GL_LIGHTING;
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bool m_GL_CULL_FACE;
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bool m_GL_POLYGON_OFFSET_FILL;
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bool m_GL_TEXTURE_2D;
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bool m_GL_POINT_SMOOTH;
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bool m_GL_LINE_SMOOTH;
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bool m_GL_BLEND;
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bool m_use_gsto;
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winding_type m_winding;
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colorf m_color;
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vec3f m_normal;
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unsigned int m_light;
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draw_type m_draw_type;
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shade_type m_shade_model;
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float m_line_width;
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unsigned short m_line_pattern;
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float m_point_size;
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//camera (see base_camera::set_state()) :
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bool m_camera_ortho;
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float m_camera_znear;
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float m_camera_zfar;
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vec3f m_camera_position;
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rotf m_camera_orientation; //used by head_light
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vec4f m_camera_lrbt;
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};
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}}
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#endif
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