102 lines
2 KiB
C
102 lines
2 KiB
C
/*
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** polygons.c - <+DESC+>
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**
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** 2014 - Frank Villaro-Dixon <Frank@Villaro-Dixon.eu>
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <math.h>
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#include "game.h"
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#include "polygons.h"
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#include "obs.h"
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#include "SDL_prims.h"
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#include "SDL/SDL.h"
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SDL_Point
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get_hexagon_vertice(int faceno, int dist) { //{{{
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SDL_Point p1;
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p1.x = dist * cos((M_PI/3)*faceno);
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p1.y = dist * sin((M_PI/3)*faceno);
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OFFSET_POINT(p1);
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return p1;
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} //}}}
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SDL_Point
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get_square_vertice(int faceno, int dist) { //{{{
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SDL_Point p1;
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p1.x = dist * cos((M_PI/2)*faceno);
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p1.y = dist * sin((M_PI/2)*faceno);
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OFFSET_POINT(p1);
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return p1;
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} //}}}
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SDL_Point
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get_triangle_vertice(int faceno, int dist) { //{{{
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SDL_Point p1;
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p1.x = dist * cos((2*M_PI/3)*faceno);
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p1.y = dist * sin((2*M_PI/3)*faceno);
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OFFSET_POINT(p1);
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return p1;
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} //}}}
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void
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draw_polygon_side(struct s_game *g, int faceno, int dist, int thick, int col) { //{{{
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SDL_Point (*get_poly_vertice)(int faceno, int dist);
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SDL_Point p1, p2, p3, p4;
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/* Depending on the polygon */
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switch(g->polygon_type) {
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case SHAPE_HEXAGON:
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get_poly_vertice = get_hexagon_vertice;
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break;
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case SHAPE_SQUARE:
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get_poly_vertice = get_square_vertice;
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break;
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case SHAPE_TRIANGLE:
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get_poly_vertice = get_triangle_vertice;
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break;
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default:
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fprintf(stderr, "Unknown SHAPE @ %s", __FILE__);
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exit(EXIT_FAILURE);
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}
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p1 = get_poly_vertice(faceno, dist);
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p2 = get_poly_vertice(faceno+1, dist);
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p3 = get_poly_vertice(faceno+1, dist+thick);
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p4 = get_poly_vertice(faceno, dist+thick);
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SDL_Point points[4] = {to_screen_coords(g, p1),
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to_screen_coords(g, p2),
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to_screen_coords(g, p3),
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to_screen_coords(g, p4)} ;
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SDL_FillPolygon(g->screen, points, 4, col);
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}//}}}
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void
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draw_polygon(struct s_game *g) { //{{{
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int faces;
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for(faces = 0; faces < SHAPE_HEXAGON; faces++) {
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draw_polygon_side(g, faces, 0, POLYGON_SIZE, 0);
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}
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for(faces = 0; faces < SHAPE_HEXAGON; faces++) {
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draw_polygon_side(g, faces, POLYGON_SIZE, POLYGON_THICK, g->color);
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}
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} //}}}
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