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Fixed upward bias of attack predictions.

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(Note: adding half an ulp is meaningful only for fixed-point
arithmetic, not for floating-point arithmetic.)
This commit is contained in:
Guillaume Melquiond 2010-06-03 20:14:05 +00:00
parent 3444701d99
commit 17a25a330a
1 changed files with 5 additions and 7 deletions
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12
src/attack_prediction_display.cpp
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@ -22,18 +22,16 @@
#include "resources.hpp"
#include "unit_abilities.hpp"
// Conversion routine for both unscatched and damage change percentage.
static void format_prob(char str_buf[10], const float prob)
// Conversion routine for both unscathed and damage change percentage.
static void format_prob(char str_buf[10], double prob)
{
if(prob > 0.9995) {
snprintf(str_buf, 10, "100 %%");
} else if(prob >= 0.1) {
snprintf(str_buf, 10, "%4.1f %%",
static_cast<float>(100.0 * (prob + 0.0005)));
snprintf(str_buf, 10, "%4.1f %%", 100.0 * prob);
} else {
snprintf(str_buf, 10, " %3.1f %%",
static_cast<float>(100.0 * (prob + 0.0005)));
snprintf(str_buf, 10, " %3.1f %%", 100.0 * prob);
}
str_buf[9] = '\0'; //prevents _snprintf error
@ -518,7 +516,7 @@ void battle_prediction_pane::get_hp_distrib_surface(const std::vector<std::pair<
SDL_FillRect(surf, &bar_rect_4, blend_rgb(surf, row_color.r, row_color.g, row_color.b, 0));
// Draw probability percentage, aligned right.
format_prob(str_buf, static_cast<float>(prob));
format_prob(str_buf, prob);
int prob_width = font::line_width(str_buf, fs);
font::draw_text_line(surf, clip_rect, fs, font::NORMAL_COLOR, str_buf,
width - prob_width - 4, 2 + (fs + 2) * i, 0, TTF_STYLE_NORMAL);