LogalDeveloper/Minecraft-Overviewer
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added sealevel option to HeightFading primitive

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This commit is contained in:
Aaron Griffith
2012-06-05 01:09:47 -04:00
parent a60b56c507
commit f4a1c32d1a
4 changed files with 17 additions and 2 deletions
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2
overviewer_core/src/overviewer.h
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@@ -26,7 +26,7 @@
// increment this value if you've made a change to the c extesion
// and want to force users to rebuild
#define OVERVIEWER_EXTENSION_VERSION 34
#define OVERVIEWER_EXTENSION_VERSION 35
/* Python PIL, and numpy headers */
#include <Python.h>

6
overviewer_core/src/primitives/height-fading.c
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@@ -20,12 +20,16 @@
typedef struct {
PyObject *black_color;
PyObject *white_color;
unsigned int sealevel;
} PrimitiveHeightFading;
static int
height_fading_start(void *data, RenderState *state, PyObject *support) {
PrimitiveHeightFading *self = (PrimitiveHeightFading *)data;
if (!render_mode_parse_option(support, "sealevel", "I", &(self->sealevel)))
return 1;
self->black_color = PyObject_GetAttrString(support, "black_color");
self->white_color = PyObject_GetAttrString(support, "white_color");
@@ -50,7 +54,7 @@ height_fading_draw(void *data, RenderState *state, PyObject *src, PyObject *mask
PyObject *height_color = self->white_color;
/* current formula requires y to be between 0 and 127, so scale it */
y = (y * 128) / (16 * SECTIONS_PER_CHUNK);
y = (y * 128) / (2 * self->sealevel);
/* negative alpha => darkness, positive => light */
alpha = (1.0 / (1 + expf((70 - y) / 11.0))) * 0.6 - 0.55;