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retain child tiles

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This commit is contained in:
Konstantin Käfer
2014-01-15 11:34:41 +01:00
parent 60a8fdca57
commit 44a0f98fe5
11 changed files with 251 additions and 169 deletions
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7
src/map/transform.cpp
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@@ -1,7 +1,6 @@
#include <llmr/map/transform.hpp>
#include <llmr/util/mat4.h>
#include <llmr/util/vec2.hpp>
#include <llmr/util/math.hpp>
#include <cmath>
#include <cstdio>
@@ -131,8 +130,8 @@ double transform::pixel_y() const {
return center + y;
}
void transform::matrixFor(float matrix[16], uint32_t tile_z, uint32_t tile_x, uint32_t tile_y) const {
const double tile_scale = pow(2, tile_z);
void transform::matrixFor(float matrix[16], const vec3<int32_t>& id) const {
const double tile_scale = pow(2, id.z);
const double tile_size = scale * size / tile_scale;
mat4_identity(matrix);
@@ -142,7 +141,7 @@ void transform::matrixFor(float matrix[16], uint32_t tile_z, uint32_t tile_x, ui
mat4_translate(matrix, matrix, -0.5f * (float)width, -0.5f * (float)height, 0);
mat4_translate(matrix, matrix, pixel_x(), pixel_y(), 0);
mat4_translate(matrix, matrix, tile_x * tile_size, tile_y * tile_size, 0);
mat4_translate(matrix, matrix, id.x * tile_size, id.y * tile_size, 0);
// TODO: Get rid of the 8 (scaling from 4096 to 512 px tile size);
mat4_scale(matrix, matrix, scale / tile_scale / 8, scale / tile_scale / 8, 1);