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#include "Renderer.h"
#include "PlayerStart.h"
#include <GL/gl.h>
void Renderer::drawGrid(const Rectangle &rect, float scale) {
float depth = log10f(scale)-0.75f;
float depth2 = floorf(depth);
float step = powf(0.1f, depth2);
float f;
int i;
float x1 = rect.getVertex1().getX(), y1 = rect.getVertex1().getY();
float x2 = rect.getVertex2().getX(), y2 = rect.getVertex2().getY();
glBegin(GL_LINES);
for(i = 0; 0.4f*(depth-depth2+i-1) < 0.5f; i++) {
f = fminf(0.4f*(depth-depth2+i), 0.5f);
glColor3f(f, f, f);
for(f = x1 - fmodf(x1, step) - step; f <= x2; f+=step) {
glVertex2f(f, y1);
glVertex2f(f, y2);
}
for(f = y1 - fmodf(y1, step) - step; f <= y2; f+=step) {
glVertex2f(x1, f);
glVertex2f(x2, f);
}
step *= 10;
}
glEnd();
}
void Renderer::fillPolygon(const Polygon &polygon) {
std::vector<Triangle> triangles;
polygon.triangulate(triangles);
glBegin(GL_TRIANGLES);
for(std::vector<Triangle>::iterator t = triangles.begin(); t != triangles.end(); t++) {
glVertex2f(t->getVertexA().getX(), t->getVertexA().getY());
glVertex2f(t->getVertexB().getX(), t->getVertexB().getY());
glVertex2f(t->getVertexC().getX(), t->getVertexC().getY());
}
glEnd();
}
void Renderer::drawPolygon(const Polygon &polygon, bool close) {
glBegin(close ? GL_LINE_LOOP : GL_LINE_STRIP);
for(Polygon::const_iterator vertex = polygon.begin(); vertex != polygon.end(); vertex++)
glVertex2f(vertex->getX(), vertex->getY());
glEnd();
}
void Renderer::drawCircle(const Vertex &m, float r, int n) {
glBegin(GL_LINE_LOOP);
for(int i = 0; i < n; i++)
glVertex2f(m.getX()+r*cosf(2*M_PI*i/n), m.getY()+r*sinf(2*M_PI*i/n));
glEnd();
}
void Renderer::drawCross(const Vertex &m, float r) {
glBegin(GL_LINES);
glVertex2f(m.getX()-r*M_SQRT1_2, m.getY()-r*M_SQRT1_2);
glVertex2f(m.getX()+r*M_SQRT1_2, m.getY()+r*M_SQRT1_2);
glVertex2f(m.getX()+r*M_SQRT1_2, m.getY()-r*M_SQRT1_2);
glVertex2f(m.getX()-r*M_SQRT1_2, m.getY()+r*M_SQRT1_2);
glEnd();
}
void Renderer::renderObject(const LevelObject &object, bool selected, bool highlighted, float scale) {
if(object.isOfType("Room"))
renderRoom(*(Room*)&object, selected, highlighted, scale);
else if(object.isOfType("PlayerStart"))
renderPlayerStart(*(PlayerStart*)&object, selected, highlighted, scale);
}
void Renderer::renderRoom(const Room &room, bool selected, bool highlighted, float scale) {
if(selected)
glColor4f(0.0f, 0.7f, 1.0f, 0.2f);
else
glColor4f(0.0f, 0.7f, 1.0f, 0.3f);
fillPolygon(room);
if(selected) {
glColor4f(1.0f, 1.0f, 1.0f, 0.9f);
glLineWidth(2.0f);
}
else if(highlighted) {
glColor4f(0.0f, 0.7f, 1.0f, 0.7f);
glLineWidth(2.0f);
}
else {
glColor4f(0.0f, 0.7f, 1.0f, 0.7f);
glLineWidth(1.0f);
}
drawPolygon(room);
}
void Renderer::renderPlayerStart(const PlayerStart &start, bool selected, bool highlighted, float scale) {
if(selected) {
glColor4f(1.0f, 1.0f, 1.0f, 0.9f);
glLineWidth(2.0f);
}
else if(highlighted) {
glColor4f(0.0f, 0.7f, 0.7f, 0.7f);
glLineWidth(2.0f);
}
else {
glColor4f(0.0f, 0.7f, 0.7f, 0.7f);
glLineWidth(1.0f);
}
drawCircle(Vertex(start.getX(), start.getZ()), 0.3f, 128);
glLineWidth(2.0f);
glColor4f(1.0f, 1.0f, 1.0f, 0.7f);
drawCross(Vertex(start.getX(), start.getZ()), 0.5f/sqrtf(scale));
}
void Renderer::render(const Level &level, const Rectangle &rect, float scale) {
glClear(GL_COLOR_BUFFER_BIT);
glLineWidth(1.0f);
glPointSize(10.0f);
drawGrid(rect, scale);
for(Level::const_iterator object = level.begin(); object != level.end(); object++) {
renderObject(**object, (&**object == editManager->getSelectedObject()),
(&**object == editManager->getHighlightedObject()), scale);
}
}
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