oneechanhax/libglez
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases 4 Wiki Activity

Fix rotation

Browse Source
This commit is contained in:
BenCat07 2018-04-02 09:51:11 +02:00
parent 0eb53f0d4d
commit e3bdf1c994
1 changed files with 39 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

48
src/glez.c
View File

@ -11,6 +11,7 @@
#include "internal/draw.h"
#include "internal/fonts.h"
#include "internal/textures.h"
#include <vec234.h>
#include <math.h>
@ -139,7 +140,6 @@ void glez_rect_outline(float x, float y, float w, float h, glez_rgba_t color,
glez_line(x + w, y + h, -w, 0, color, thickness);
glez_line(x, y + h, 0, -h, color, thickness);
}
void glez_rect_textured(float x, float y, float w, float h, glez_rgba_t color,
glez_texture_t texture, float tx, float ty, float tw,
float th, float angle)
@ -162,34 +162,64 @@ void glez_rect_textured(float x, float y, float w, float h, glez_rgba_t color,
float t0 = ty / tex->height;
float t1 = (ty + th) / tex->height;
vertices[0].position.x = x * cos(angle) - y * sin(angle);
vertices[0].position.y = x * sin(angle) + y * cos(angle);
vertices[0].position.x = x;
vertices[0].position.y = y;
vertices[0].tex_coords.x = s0;
vertices[0].tex_coords.y = t1;
vertices[0].color = color;
vertices[0].mode = DRAW_MODE_TEXTURED;
vertices[1].position.x = x * cos(angle) - y * sin(angle);
vertices[1].position.y = (x * sin(angle) + y * cos(angle)) + h;
vertices[1].position.x = x;
vertices[1].position.y = y + h;
vertices[1].tex_coords.x = s0;
vertices[1].tex_coords.y = t0;
vertices[1].color = color;
vertices[1].mode = DRAW_MODE_TEXTURED;
vertices[2].position.x = (x * cos(angle) - y * sin(angle)) + w;
vertices[2].position.y = (x * sin(angle) + y * cos(angle)) + h;
vertices[2].position.x = x + w;
vertices[2].position.y = y + h;
vertices[2].tex_coords.x = s1;
vertices[2].tex_coords.y = t0;
vertices[2].color = color;
vertices[2].mode = DRAW_MODE_TEXTURED;
vertices[3].position.x = (x * cos(angle) - y * sin(angle)) + w;
vertices[3].position.y = x * sin(angle) + y * cos(angle);
vertices[3].position.x = x + w;
vertices[3].position.y = y;
vertices[3].tex_coords.x = s1;
vertices[3].tex_coords.y = t1;
vertices[3].color = color;
vertices[3].mode = DRAW_MODE_TEXTURED;
if (angle) {
float v1[2] = {vertices[0].position.x, vertices[0].position.y};
float v2[2] = {vertices[1].position.x, vertices[1].position.y};
float v3[2] = {vertices[2].position.x, vertices[2].position.y};
float v4[2] = {vertices[3].position.x, vertices[3].position.y};
vertices[0].position.x = -tw;
vertices[1].position.x = -tw;
vertices[2].position.x = tw;
vertices[3].position.x = tw;
vertices[0].position.y = -th;
vertices[1].position.y = th;
vertices[2].position.y = th;
vertices[3].position.y = -th;
for (int i = 0; i < 4; i++) {
float x = vertices[i].position.x;
float y = vertices[i].position.y;
vertices[i].position.x = x *cos(angle) - y *sin(angle);
vertices[i].position.y = x *sin(angle) + y *cos(angle);
}
vertices[0].position.x += v1[0];
vertices[0].position.y += v1[1];
vertices[1].position.x += v2[0];
vertices[1].position.y += v2[1];
vertices[2].position.x += v3[0];
vertices[2].position.y += v3[1];
vertices[3].position.x += v4[0];
vertices[3].position.y += v4[1];
}
vertex_buffer_push_back(program.buffer, vertices, 4, indices, 6);
}