blame: source/code/HelpHowtoState.cpp

/*

===========================================================================

blockattack - Block Attack - Rise of the Blocks

Copyright (C) 2005-2018 Poul Sander

This program is free software: you can redistribute it and/or modify

it under the terms of the GNU General Public License as published by

the Free Software Foundation, either version 2 of the License, or

(at your option) any later version.

This program is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

GNU General Public License for more details.

You should have received a copy of the GNU General Public License

along with this program.  If not, see http://www.gnu.org/licenses/

Source information and contacts persons can be found at

https://blockattack.net

===========================================================================

*/

#include "HelpHowtoState.hpp"

#include "global.hpp"

#include "common.h"

#include "MenuSystem.h"

#include <cmath>

extern sago::SagoSprite bricks[7];

/**

 * Draws bricks with a string like:

 * "aab" for two identical one and another

 * "aaB" the third one will have a bomb

 * The any char not in 'a' to 'g' or 'A' to 'G' the behavior is undefined.

 * @param target Target to draw to

 * @param bricks description on what to draw as a string

 * @param x

 * @param y

 */

static void RenderRowOfBricks(SDL_Renderer* target, const std::string& brickStr, int x, int y) {

	Uint32 tick = SDL_GetTicks();

	for (size_t i = 0; i < brickStr.size(); ++i) {

		bool bomb = false;

		char brickChar = brickStr[i];

		if (brickChar >= 'A' && brickChar <= 'G') {

			bomb = true;

			brickChar = brickChar + 'a' - 'A';

		}

		if (brickChar >= 'a' &&  brickChar <= 'g') {

			bricks[brickChar - 'a'].Draw(target, tick, x+i*50, y);

			if (bomb) {

				globalData.spriteHolder->GetSprite("block_bomb").Draw(target, tick, x+i*50, y);

			}

		}

	}

}

class HorizontalSwitchAnimation {

public:

	std::string brickStr = "abc";

	int cursorPos = 0;

	int state = 0; //0=move left, 1 = switch, 2 = move right, 3 = switch

	Uint32 lastTick = 0;

	Uint32 animationSpeed = 2000;

	void Update (Uint32 tick) {

		if (tick > lastTick + animationSpeed) {

			lastTick = tick;

			switch (state) {

			case 0:

				cursorPos = 1;

				break;

			case 1:  //fallthough

			case 3:

				std::swap(brickStr[cursorPos], brickStr[cursorPos + 1]);

				break;

			case 2:

				cursorPos = 0;

				break;

			}

			++state;

			if (state > 3) {

				state = 0;

			}

		}

	}

};

class MultiLineBlocks {

private:

	std::vector<std::string> lines;

public:

	MultiLineBlocks& addLine(const std::string& line) {

		lines.push_back(line);

		return *this;

	}

	void Render(SDL_Renderer* target, int x, int y) {

		for (size_t i = 0; i < lines.size(); ++i) {

			RenderRowOfBricks(target, lines[i], x, y+i*50);

		}

	}

};

HorizontalSwitchAnimation switchAnimation;

sago::SagoTextField switchAnimationField;

sago::SagoTextField clearRowfield;

sago::SagoTextField comboField;

sago::SagoTextField dropField;

sago::SagoTextField chainField;

static void InitTextField(sago::SagoTextField& field, const char* text) {

	field.SetHolder(&globalData.spriteHolder->GetDataHolder());

	field.SetFontSize(30);

	field.SetOutline(2, {0,0,0,255});

	field.SetText(text);

}

HelpHowtoState::HelpHowtoState() {

	InitTextField(switchAnimationField, _("Switch block horizontally"));

	InitTextField(clearRowfield, _("Match 3 to clear"));

	InitTextField(comboField, _("Create combos!"));

	InitTextField(dropField, _("Drop blocks!"));

	InitTextField(chainField, _("Create a chain effect"));

}

HelpHowtoState::~HelpHowtoState() {

}

const double PI  =3.141592653589793238463;

static void DrawArrow(SDL_Renderer* target, int x1, int y1, int x2, int y2) {

	double dx = x1-x2;

	double dy = y1-y2;

	double distance = std::sqrt((dx*dx)+(dy*dy));

	dx = dx * 10.0 / distance;

	dy = dy * 10.0 / distance;

	double angle= PI/4.0;

	double nx1 = dx * std::cos(angle) - dy * std::sin(angle) + x2;

	double ny1 = dx * std::sin(angle) + dy * std::cos(angle) + y2;

	SDL_RenderDrawLine(target, x1, y1, x2, y2);

	SDL_RenderDrawLine(target, nx1, ny1, x2, y2);

	nx1 = dx * std::cos(-angle) - dy * std::sin(-angle) + x2;

	ny1 = dx * std::sin(-angle) + dy * std::cos(-angle) + y2;

	SDL_RenderDrawLine(target, nx1, ny1, x2, y2);

}

void HelpHowtoState::Draw(SDL_Renderer* target) {

	DrawBackground(target);

	SDL_SetRenderDrawColor(target, 0, 0, 0, SDL_ALPHA_OPAQUE);

	RenderRowOfBricks(target, switchAnimation.brickStr, 50, 50);

	globalData.spriteHolder->GetSprite("cursor").Draw(target, SDL_GetTicks(), 50+switchAnimation.cursorPos*50, 50);

	switchAnimationField.Draw(target, 50 +150+30, 50+25, sago::SagoTextField::Alignment::left, sago::SagoTextField::VerticalAlignment::center);

	RenderRowOfBricks(target, "adaa", 50, 150);

	globalData.spriteHolder->GetSprite("cursor").Draw(target, SDL_GetTicks(), 50, 150);

	RenderRowOfBricks(target, "dAAA", 50+300, 150);

	DrawArrow(target, 50+200+25, 150+25, 50+300-25, 150+25);

	clearRowfield.Draw(target, 600, 150+25, sago::SagoTextField::Alignment::left, sago::SagoTextField::VerticalAlignment::center);

	comboField.Draw(target, 50+175, 410, sago::SagoTextField::Alignment::center);

	MultiLineBlocks().addLine("ab").addLine("ba").addLine("ab").Render(target, 50, 250);

	globalData.spriteHolder->GetSprite("cursor").Draw(target, SDL_GetTicks(), 50, 250+50);

	MultiLineBlocks().addLine("AB").addLine("AB").addLine("AB").Render(target, 50+200, 250);

	DrawArrow(target, 175, 325, 225, 325);

	MultiLineBlocks().addLine("a").addLine("b").addLine("e").Render(target, 50+400, 250);

	globalData.spriteHolder->GetSprite("cursor").Draw(target, SDL_GetTicks(), 50+400, 250);

	MultiLineBlocks().addLine(" ").addLine("b").addLine("ea").Render(target, 50+400+200, 250);

	dropField.Draw(target, 50+400+150, 410, sago::SagoTextField::Alignment::center);

	DrawArrow(target, 575, 325, 625, 325);

	DrawArrow(target, 475, 275, 525, 275);

	DrawArrow(target, 525, 275, 525, 375);

	DrawArrow(target, 675, 275, 725, 275);

	DrawArrow(target, 725, 275, 725, 375);

	MultiLineBlocks().addLine(" d").addLine(" f").addLine(" f").addLine("fdd").Render(target, 50, 500);

	MultiLineBlocks().addLine(" d").addLine(" F").addLine(" F").addLine("dFd").Render(target, 50+200, 500);

	MultiLineBlocks().addLine(" d").addLine("  ").addLine("  ").addLine("d d").Render(target, 50+200*2, 500);

	MultiLineBlocks().addLine("  ").addLine("  ").addLine("  ").addLine("DDD").Render(target, 50+200*3, 500);

	globalData.spriteHolder->GetSprite("cursor").Draw(target, SDL_GetTicks(), 50, 650);

	DrawArrow(target, 200, 600, 250, 600);

	DrawArrow(target, 400, 600, 450, 600);

	DrawArrow(target, 600, 600, 650, 600);

	DrawArrow(target, 525, 525, 525, 675);

	chainField.Draw(target, 400, 710, sago::SagoTextField::Alignment::center);

	HelpCommonState::Draw(target);

}

void HelpHowtoState::Update() {

	switchAnimation.Update(SDL_GetTicks());

	HelpCommonState::Update();

}