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#include "video/video.h"
#include <math.h>
static float alpha = 0;
const static float rec_scale_factor = 0.25f;
static float xv[] = { 0.5f, 0.3245f, 0.6f, 0.5f, 0.68f, -0.3f };
static float yv[] = { 0.8f, 1.0f, 0.0f, 0.2f, 0.2f, 0.0f };
static float x(void) { return xv[0] * sinf(xv[1] * alpha + xv[2]) - xv[3] * sinf(xv[4] * alpha + xv[5]); }
static float y(void) { return yv[0] * cosf(yv[1] * alpha + yv[2]) - yv[3] * sinf(yv[4] * alpha + yv[5]); }
static float dx(void) { return xv[1] * xv[0] * cosf(xv[1] * alpha + xv[2]) - xv[4] * xv[3] * cosf(xv[4] * alpha + xv[5]); }
static float dy(void) { return - yv[1] * yv[0] * sinf(yv[1] * alpha + yv[2]) - yv[4] * yv[3] * sinf(yv[4] * alpha + yv[5]); }
float getRecognizerAngle(vec2 *velocity)
{
float dxval = velocity->v[0];
float dyval = velocity->v[0];
float phi = acosf ( dxval / sqrtf( dxval * dxval + dyval * dyval ) );
if (dyval < 0) {
phi = 2 * PI - phi;
}
return (phi + PI / 2) * 180 / PI;
}
void getRecognizerPositionVelocity(vec2 *p, vec2 *v) {
float max = recognizer->BBox.vSize.v[0] * rec_scale_factor;
float rec_boundry = game2->rules.grid_size - max;
p->v[0] = (max + (x() + 1.0f) * rec_boundry) / 2.0f;
p->v[1] = (max + (y() + 1.0f) * rec_boundry) / 2.0f;
v->v[0] = dx() * game2->rules.grid_size / 100.f;
v->v[1] = dy() * game2->rules.grid_size / 100.f;
}
void drawRecognizerShadow(void) {
float dirx;
vec2 p, v;
/* states */
glEnable(GL_CULL_FACE);
if(gSettingsCache.use_stencil) {
glEnable(GL_STENCIL_TEST);
glStencilOp(GL_REPLACE, GL_REPLACE, GL_REPLACE);
glStencilFunc(GL_GREATER, 1, 1);
glEnable(GL_BLEND);
glColor4fv(shadow_color);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
} else {
glColor3f(0, 0, 0);
glDisable(GL_BLEND);
}
/* transformations */
getRecognizerPositionVelocity(&p, &v);
dirx = getRecognizerAngle(&v);
glPushMatrix();
glMultMatrixf(shadow_matrix);
glTranslatef( p.v[0], p.v[1], RECOGNIZER_HEIGHT);
glRotatef(dirx, 0, 0, 1); /* up */
glScalef(rec_scale_factor, rec_scale_factor, rec_scale_factor);
glEnable(GL_NORMALIZE);
/* render */
drawModel(recognizer, TRI_MESH);
/* restore */
if(gSettingsCache.use_stencil)
glDisable(GL_STENCIL_TEST);
glDisable(GL_BLEND);
glDisable(GL_CULL_FACE);
glPopMatrix();
}
void drawRecognizer(void) {
float dirx;
vec2 p, v;
glPushMatrix();
/* transformations */
getRecognizerPositionVelocity(&p, &v);
dirx = getRecognizerAngle(&v);
glTranslatef( p.v[0], p.v[1], RECOGNIZER_HEIGHT);
glRotatef(dirx, 0, 0, 1); /* up */
glScalef(rec_scale_factor, rec_scale_factor, rec_scale_factor);
glDisable(GL_LIGHT0);
glDisable(GL_LIGHT1);
glLightfv(GL_LIGHT2, GL_SPECULAR, rec_spec_color);
glEnable(GL_LIGHT2);
glDisable(GL_BLEND);
glEnable(GL_CULL_FACE);
if (gSettingsCache.light_cycles) {
glEnable(GL_LIGHTING);
}
glEnable(GL_POLYGON_OFFSET_FILL);
glPolygonOffset(1,1);
glEnable(GL_NORMALIZE);
glColor3f(0.0, 0.0, 0.0);
drawModel(recognizer, TRI_MESH);
glDisable(GL_POLYGON_OFFSET_FILL);
glDisable(GL_LIGHT2);
glEnable(GL_LIGHT1);
glDisable(GL_LIGHTING);
glColor3fv(rec_outline_color);
glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
glEnable(GL_BLEND);
glEnable(GL_LINE_SMOOTH);
drawModel(recognizer_quad, QUAD_MESH);
glDisable(GL_LINE_SMOOTH);
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
glDisable(GL_CULL_FACE);
glPopMatrix();
}
void doRecognizerMovement(void) {
alpha += game2->time.dt / 2000.0f;
}
void resetRecognizer(void) {
alpha = 0;
}
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